n.抽吸；脈動

動詞pump的現(xiàn)在分詞.

Her heart was pumping very fast. 她的心臟跳得很快。

The pump sucks air out (of the vessel) through this valve. 這臺泵通過這個閥門把(容器中的)空氣抽出。

After several pumps, the water began to flow. 用泵抽了幾下之后,水流出來了。

You will need to pump hard for several minutes to fill the tank. 你需用泵著實抽吸幾分鐘，才能把油箱灌滿。