A small, European freshwater carp, easily caught and used as bait.

【动】白杨鱼(欧洲所产鲤鱼科之淡水鱼，易于捕捉，常作饵品者)。

A person easily imposed upon.

易受欺骗之人。

An iron pin or shaft on which a wheel revolves.

轴头；耳轴。

A socket or ring receiving a pin that turns, as the ring or eye of a hinge.

中枢。