air pocket
柯林斯词典
1. N a localized region of low air density or a descending air current, causing an aircraft to suffer an abrupt decrease in height (使飞机骤跌的)气穴
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1. N a localized region of low air density or a descending air current, causing an aircraft to suffer an abrupt decrease in height (使飞机骤跌的)气穴