n. a simple machine consisting of a circular frame with spokes (or a solid disc) that can rotate on a shaft or axle (as in vehicles or other machines)
n. forces that provide energy and direction
n. a circular helm to control the rudder of a vessel
v. change directions as if revolving on a pivot
n. 轮子, 车轮, 轮, 方向盘, 旋转, 机构, 重要人物
vt. 使旋转, 转动, 使转向
vi. 旋转, 转弯, 盘旋