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n. 开关齿轮
✅ 同义词
🗣️ 情景例句
I'm as healthy as a horse.
我像马驹一样健康。
When a dog is drowning everyone offers him drink.
落井下石。
torn by the noise of the taxicabs, lorries and buses, and thronged ceaselessly by great crowds.
街道上充斥着汽油味和有毒气体，出租汽车、卡车、公共汽车的噪音刺耳难忍，络绎不绝的人群挤来挤去。