vt.& vi.使用(工具),经常供应(食物、饮料),固定往来,经营生意
n.(毛线、绳等的)股,层,厚,(夹板的)层片
vt.(娴熟地)使用
The brightly-coloured boats ply between the islands.
色彩明艳的船只往来于岛屿之间。
You need 3 balls of any 4-ply knitting wool.
需要随便3团4股羊毛线。
It's illegal for unmarked mini-cabs to ply for hire.
无标志的电话预订出租车沿街拉客是非法的。