What part of the English explanation does the dash represent~ For example: the sense organizations that "connect" all animals to the outside world are merely transducers -- instruments like a microphone, TV camera, or phonograph pickup arm -- which convert one form of energy into another Which part of the content do these two dashes refer to? Are there any foreign language experts?

What part of the English explanation does the dash represent~ For example: the sense organizations that "connect" all animals to the outside world are merely transducers -- instruments like a microphone, TV camera, or phonograph pickup arm -- which convert one form of energy into another Which part of the content do these two dashes refer to? Are there any foreign language experts?

A master, please come in, and no one will take care of you recently

The function of dash
For example, after class
Give an example of each effect

1. Used to explain the part of the text
Step into the golden gate, pass through the wide air door hall and cloakroom, and you will arrive at the central hall, the hub of the city hall
2. Used for a sudden change of topic
"It's hot today - when are you going to Shanghai?" Zhang Qiang said to Xiao Wang
3. Behind onomatopoeia used for voice extension
The train started
4. It is used before listing the sub contracting items
According to the different research objects, environmental physics is divided into the following five branches
——Environmental acoustics;
——Environmental Optics;
——Environmental thermology;
——Environmental electromagnetics;
——Ambient aerodynamics
From the 10th edition of Xinhua Dictionary