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他们无法为地面作战行动提供足够的空中掩护。
They could not provide adequate air cover for ground operations.
《柯林斯英汉双解大词典》
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他们在警方的掩护下采取了行动。
They took action with police's coverture.
youdao
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他们在警方的掩护下采取了行动。
They acted under cover of the police.
youdao
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他们在警方的掩护下采取了行动。
They acted under cover of the police.
youdao