这艘小船配备了可转向的螺旋桨，便于在狭窄的水道中航行。

This small boat is equipped with ___steerable propellers for easy navigation in narrow waterways.

这款遥控车的转向系统非常灵活，很容易操控。

This remote-controlled car has a highly ___steerable system, making it easy to control.