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可混凝土的一个问题是,即使变硬以后,它仍然吸水。
But one of the problems with concrete is that even after its hardened, it still absorbs water.
youdao
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可混凝土的一个问题是,即使变硬以后,它仍然吸水。
But one of the problems with concrete is that even after its hardened, it still absorbs water.
youdao