...to ride a bicycle 骑自行车 | hand signals 手势 | freewheel 飞轮...
手示信号
...traffic signs, roadsigns 道路标志信号 | hand signals 手示信号 | no right turn 禁止右转弯...
手勢信號(司機指示轉彎等的)
...*a signal made with a red flag 用红旗... | * hand signals, ie made by the driver of a car, etc to show which way it will turn, etc 手势信号(司机指示转弯等的) | * She flashed the torch as a signal. 她用......