ply

v. /plaɪ/ C2

定期往返于；经营；操（业）

To travel regularly over a route, or to work steadily at.

仙境例句

Little boats ply between England and France, and a friendly porpoise swims along behind them.

小船定期往返于英国和法国之间，一只友好的鼠海豚就跟在后面游。