名词
中文翻译：后退角度
同义词：
['turn-off angle', 'retraction angle']
例句：
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1.The car needed to back off the gas a bit to avoid hitting the pedestrian.
汽车需要稍微踩下油门，以避免撞到行人。
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2.The team decided to back off on their criticism of the new policy.
团队决定对新政策持保留意见。
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3. The pilot had to back off the throttle and level out the aircraft before landing.
飞行员在着陆前必须松开油门，使飞机保持稳定。