strokes of pump

例句：

1. 1. The engineer was trying to figure out how many strokes of the pump were needed for the job.
   工程师正在试图弄清楚泵需要多少冲程来完成这项工作。
2. 2.The pump is designed to perform thousands of strokes per minute.
   该泵设计为每分钟执行数千次冲程。
3. 3. The pump's efficiency can be improved by reducing the number of strokes required.
   通过减少所需的冲程数量，可以提高泵的效率。