Polar bond
[化] 极性键
🧩 词语组成解析
🗣️ 情景例句
OK. Let's pick up the pace.
好 把节奏加快一些。
It's windy this afternoon.
今天下午起风。
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。