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讀的時候我們老師手都Lou或Rou第一聲,不能讀其他的聲調象樓、摟、肉都不行
希臘字母柔(Ρ,ρ)Rho(大寫Ρ,小寫ρ),是第十七個希臘字母.小寫ρ用於:密度符號ρ=m/V(式中m代表物質質量,V代表物質體積)與之相關公式液體內部壓強:p=ρgh(式中ρ錶…
jing三聲 和“井”同音.
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