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

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