The fact that coal mine refuse of Yongcheng is sandy mudstone was confirmed by XRD.

经XRD证实永城煤矸石是砂质泥岩。

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This test showed that the kind of fine mixed mine refuse and home refuse have the best result.

试验研究表明，垃圾与矸石均匀混合堆置方式具有较好的效果。

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As he is an ole friend of mine, I find it difficult to refuse him.

由于他是我的老朋友，我觉得很难拒绝他。

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Sometimes you might have to work so annoyingly hard, like one close friend of mine did, that you refuse to leave.

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