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固定：环境-建筑残骸可能漂浮在空气中。
Fixed: Environment - Building debris may float in the air.
youdao
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重新固定盖板，并紧密密封防止空气和水通过。
Reattach cover plate to make an air and water tight seal.
youdao
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重新固定盖板，并紧密密封防止空气和水通过。
Reattach cover plate to make an air and water tight seal.
youdao