Helicopters don't fly. They beat the air into submission.

直升机不会飞, 它只是让空气屈服而已.

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He raised his forefinger and beat the air oldly before his voice spoke.

他举起食指,老谋深算地在空中摆了几下才说下去.

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All you are doing is to beat the air . Try to be more practical.

你目前所做的一切都是徒劳无功的.

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