落地时双脚并拢，双臂前伸以保持平衡。
Keep your feet together and your arm forward to keep your balance.
起床前别忘了伸个懒腰。
研究了舰载机前起落架的突伸运动。
The fast-extension motion of the nose gear of the carrier-based aircraft is studied.
研究了舰载机前起落架的突伸运动。
The fast-extension motion of the nose gear of the carrier-based aircraft is studied.
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