单词beat--the--air
na.: 徒劳；白劳
网络: 白费力气；徒劳无功；打空气
Are like Don Quixote in your actions. All you are doing is to beat the air. Try to be practical.
你的举动活像堂诃德。你所做的一切都是白费气力的，还是实际一点吧。
All you are doing is to beat the air. Try to be practical.
你做的一切都是徒劳的，还是实际一点吧。
His speech merely beat the air as his argument was not convincing at all.
他的演说一点用也没有，因为他的观点不令人信服。
large calm lakes there too, in which white swans were swimming, and beat the air with their wings.
木中还有静静的湖，湖里还有游泳着的白天鹅，它们在拍着翅膀。
And the gander opened his strong wings and beat the air with them to show his power.
说完，它张开自己的大翅膀拍打着周围的空气，以此来表示自己有多么强大。
My sister is very pigheaded , if you want to change her mind is ultimately like beat the air.
我妹妹很固执的，你要她改变心意根本就是白费力气。