pilot

n. 飞行员,领航员,引航员
v. 领航,驾驶,向导

Mark used to be a pilot on the Mississippi River.

马克曾在密西西比河上当过领航员。

We are doing a pilot study to see if the new product will sell well.

我们正在为这种新产品做试销调查，看它的销路好不好。