例句與造句

1. As it contracts , the principle of angular momentum conservation forces it to rotate faster [ see box on opposite page ]
   當它收縮時，角動量守恒的原理強迫它轉(zhuǎn)得更快（見右頁氣體盤的誕生） 。
2. It's difficult to find principle of angular momentum in a sentence. 用principle of angular momentum造句挺難的