straight line body 直线车身
Pilots from different countries understand body signals if they have the correct training. When you wave your arms up and down in a straight line, it means "yes".
如果接受了正确的训练，来自不同国家的飞行员都能理解身体信号。当你沿一条直线上下摆动手臂时，就表示“是”。
Your body should form a straight line from ankles to head [a].
你的身体从脚踝到头部应形成一条直线。
Keeping your elbow under your shoulder, push yourself up until your body is in a straight line.
以肘部力量支撑肩部，身体向上用力，使身体形成一条直线。
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