beat the air

基本解释

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。
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。
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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。

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