名词
中文翻译：反旋螺旋桨
同义词：
['counter-rotating propeller', 'contra-rotating propeller']
例句：
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1. Theaircraft's contrarotating propellers were designed to improve efficiency.
飞机的反旋螺旋桨设计旨在提高效率。
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2.The new model jet engine features a contrarotating propeller that reduces noise.
新型喷气发动机采用反旋螺旋桨，以降低噪音。
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3. The pilot had to make quick adjustments to the contrarotating propellers to avoid hitting obstacles.
飞行员不得不迅速调整反旋螺旋桨以避免撞上障碍物。