three forces的用法和樣例：
例句
- We all understand that over-development of any forces will result in disaster.
因為我們都了解，任何一股力量如果過(guò)度發(fā)展，都會(huì )有災難。 - I started thinking about the fact that I stand in the middle of two opposing forces in the Negro community.
我開(kāi)始考慮這麼一個(gè)實(shí)際情況，即我恰恰站在黑人社會(huì )兩股對立的力量中間，滿(mǎn)足于現狀的那股力量由兩類(lèi)黑人組成。
