她用胳膊发出左转弯信号。

She given a left turning signal with her arm.

youdao

左转弯时，驾驶员要提前发出转向信号，转向时尽可能靠道路中心，为后车和右转弯的车提供方便；

Turn left, the driver should make turn signal, to as far as possible by the road center, for after the car and right turn the car to provide convenient;

youdao

左转弯时，驾驶员要提前发出转向信号，转向时尽可能靠道路中心，为后车和右转弯的车提供方便；

Turn left, the driver should make turn signal, to as far as possible by the road center, for after the car and right turn the car to provide convenient;

youdao