用刷子就可以刷去硬泥。

A brush can remove hardened mud.

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这部电影的首演是在学校操场的硬泥地上搭建起来的帐篷。

The venue for the film's premiere was a tent erected over the hard-packed earth of the school playground.

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但对于实际中最广泛存在的硬脆性泥页岩，裂缝和微裂缝的存在是普遍性的，而且对泥页岩稳定的影响是不可忽视的。

But with brittle shale that widely exist in the world, fractures and micro-fractures are ubiquitous, its effect on shale stability cannot be neglected.

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