English translation I want to go abroad Learn some practical English translations of mathematics, physics and chemistry terms

First, I'll give you some oral English, which you need to use almost every day when you study abroad. If it's to your taste, I'll provide it again, so as not to waste each other's time

I'm from Yueyang District, Hunan Province. Mathematics is from Hunan Education Press. English is from new target people's education press. Physics is from science education press. Chemistry is from people's education press. Don't make a mistake. It's necessary to have something that is more difficult and doesn't need basic classes. It's better to have done it yourself and experience it deeply. If it's really good, you must add points!
Only for the third year of junior high school, not including the high school entrance examination. It's better to tell me where I bought it. Again, as long as for the third year of junior high school, the review of the high school entrance examination should not be difficult. Don't repeat it with the upstairs

Five year high school entrance examination three year simulation
Top students' question bank
"Key and difficult points manual" is good
The problem is difficult, suitable for improving performance, can do the kind of the last small problem of each big problem

How to prove that two straight lines are perpendicular (with coordinates) in space rectangular coordinate system

Using the direction vector of two lines, the scalar product is 0
That is, if a (x1, Y1, z1), B (X2, Y2, Z2)
A direction vector of AB is (x2-x1, y2-y1, z2-z1)
If C (X3, Y3, Z3), D (x4, Y4, Z4)
One direction vector of CD is (x4-x3, y4-y3, z4-z3)
Just prove that ab * CD = (x2-x1) (x4-x3) + (y2-y1) (y4-y3) + (z2-z1) (z4-z3) = 0

If sin α = Cos2 α and α belongs to the second quadrant, then Tan α=

sinα=cos2α
sina=1-2sin^2a
2sin^2a+sina-1=0
Sina = - 1 or Sina = 1 / 2 α belongs to the second quadrant, Sina > 0
So Sina = 1 / 2 cosa = - √ 3 / 2
tana=-√3/3

My hobby is writing 400 words

My mother pouted and said, "well, don't read it, go to the zoo!" then she pulled me up and left. "Wait a minute, I want to buy this book!" when I got to the zoo, I thought it was boring in the zoo. My book addiction broke again. I quietly ran to the gate of the zoo with my mother behind my back, sat on the threshold and started reading again! My mother pulled my hair again, I just woke up from the "sea of books"! "Look at you, read a book, you didn't see the acrobatics in it, what a pity!" my mother began to nag again Yes, I love reading very much. Book is just a blooming flower with sweet nectar of knowledge. Book is a good guide, leading us into the world of knowledge. Book is a boat, carrying us into the bay of knowledge. I love books
I love reading
Playing the pipa, singing, dancing and painting. People have their own interests in their spare time. Most of my fun is to soak in books. Books are my good friends. When I was a child, my father told the story of kitten fishing. It was about kitten and his mother fishing together. Kitten caught dragonflies and butterflies for a while, but got nothing, The kitten stopped catching dragonflies and butterflies, went fishing seriously, and finally caught a big fish. From this story, I realized that I can't do anything with one mind. I have to do it seriously, so that I can accomplish it well. I grew up and can read comic books. The dynamic content attracted me, such as little red riding hood, little match girl, Cinderella, etc, My favorite story is snow white. A queen made two wishes before giving birth to her daughter, hoping that her daughter's skin would be as white as snow and her lips would be as red as blood. Soon after her daughter was born, the queen died, so the emperor married a new queen. The new queen was so jealous that she told her men to kill the princess in the forest. They couldn't bear to kill her, The new queen has a magic mirror. Every time she asks the magic mirror who is the most beautiful person in the world, the magic mirror answers that it is snow white. The queen thinks of several ways to kill the princess, but they all fail. Finally, the prince and the princess get married and live happily together, That is not to be envious of others. We can't laugh at them when they make mistakes. We should encourage them to live together peacefully in everything they do. Years are like flowing water. Gradually, I have read science stories, fairy tales and stories of foreign scientists. There is a scientist named Edison who invented more than 1000 kinds of things, including movies, gramophone and filament in electric light, He studied hard, never satisfied, and won the respect and love of the people all over the world. When he was doing experiments, sulfuric acid burned his clothes, and almost blinded his eyes. From these articles, I realized that in order to achieve excellent results, we have to pay hard work. The ancients said, "there is a road to study, there is no limit to study, there is no limit to work hard.", I want to learn from his indomitable and enterprising spirit, have the courage to practice, and always be ready to fight for the scientific cause of the motherland and become a scientist. Books are my good friends, and I love you!

It's about logs
logX+log(X-1)=log2
What is the value of X?

logX+log(X-1)=log[X(X-1)]=log2
X(X-1)=2
X = - 1 or 2
But both X and X-1 are positive
therefore
X=2
It's not right on the first floor
You remember the formula
loga+logb=logab

This is how to get X1 + x2 = - B / A, x1x2 = C / A

1. A room with 40 pieces of 30 cm long and 20 cm wide rectangular turntable is replaced by an isosceles right triangle turntable with a waist length of 20 cm. How many pieces of turntable do you need?
2. The length of the top bottom of the trapezoid below is half of that of the bottom. If the area of the triangle above is 6 square centimeters, how many square centimeters is the area of the triangle below?

1. It takes x pieces to make a full bed
20*20/2*x=20*30*40
x=120
A: it costs 120 yuan to cover it
2.6 * 2 = 12 square centimeters
Do you understand

Is the final of "Bian" Ian or an,

ian bian

Let ABC be an isosceles triangle with angle ABC = 120 degrees, then the eccentricity of the hyperbola with a B as the focus and passing through point C is?
Let ABC be an isosceles triangle with angle ABC = 120 degrees, then the eccentricity of the hyperbola with a B as the focus and passing through point C is?
What I remember is: 2A = ac-bc = 2 radical 3-2c
So e = C / a = (radical 3 + 1) / 2
But there seems to be something wrong. I can't understand what I remember at that time

Focus on a and B, 2C = ab
Angle ABC = 120 degrees, AC = √ 3AB
2a=AC-BC=AC-AB=(√3-1)AB
So, e = C / a = AB / (√ 3-1) AB = 1 / (√ 3-1) = (√ 3 + 1) / 2
-----------Your memory is right

English translation I want to go abroad Learn some practical English translations of mathematics, physics and chemistry terms