🗣️ 情景例句
It's us, Susan.
是我们， Susan。
Which one is more economical?
哪一个是比较经济的？
that a series of deep soundings was obtained in the Atlantic and the first samples were collected by dredging the bottom.
才在大西洋测得一个个海水深度，同时通过挖掘海底，取得了研究海底的首批样品。