The rocket gives the car plenty of power, but it is either on or off.
火箭发动机给汽车提供大量的动力，但是操作它只是开或关。
An attempt to score a goal, made with any (legal) part of the body, either on or off target.
对射门得分的尝试，可以由符合规则规定的任何身体部位完成，无论中目标与否。
The switch can only be either totally on or totally off at any given time. The same is true for the light.
开关在任何时候都仅仅是控制着完全开和关。灯也确实是一样。
The switch can only be either totally on or totally off at any given time. The same is true for the light.
开关在任何时候都仅仅是控制着完全开和关。灯也确实是一样。
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