[] (plies, plying, plied, plied) to travel regularly along a particular route or between two particular places（车、船）定期地来回，经常往返于◆airlines plying transatlantic routes定期往返于跨大西洋航线的航空公司●ply your ˈtradeto do your work or business从事；经营◆This is the restaurant where he plied his trade as a cook.这是他做厨师的那家餐厅。