All was well until last Wednesday, when a crack appeared in the soil causing a small amount of rubble to fall. This was followed by another massive landslip.

而在上周三，地面开始出现裂缝，紧接着的面试大面积的塌陷。

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The crack propagation characteristics of X70 pipeline steel in the synthetic soil solution under cyclic loading are investigated.

试验研究了X70管线钢在模拟土壤介质中，循环载荷下的裂纹扩展特性和宏观规律。

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The crack propagation characteristics of X70 pipeline steel in the synthetic soil solution under cyclic loading are investigated. The macroscopical rules of the crack propagation are analyzed as well.

试验研究了X70管线钢在模拟土壤介质中，循环载荷下的裂纹扩展特性和宏观规律。

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