Principium
n. 原理, 基本原理
??? 情景例句
That's OK.
不去不要緊。
Bill was very jumpy as he waited for the phone to ring.
貝爾忐忑不安地等著電話來。
Great! Could you bring it to school tomorrow?
好極了！你明天能把它帶到學(xué)校來嗎？