Protohistory
n. 史前人類學(xué), 史前時(shí)期
? 同義詞
??? 情景例句
Sure.
當(dāng)然是。
Which one is more economical?
哪一個(gè)是比較經(jīng)濟(jì)的？
hold the string so that the weight nearly touches the ground.
讓重物幾乎接觸地面。