求翻译：裂缝是混凝土工程中最普遍的病害之一。裂缝的出现， 致使混凝土强度下降， 承载力减弱， 在持续的受力作用下，其结果更为严重，同时会造成严重的经济损失。但如果裂缝小于标准要求的极限，一般不会影响工程结构的承载能力、使用功能和耐久性，往往只影响结构外观而产生疑虑。至于混凝土出现裂缝的原因很多，一般主要有以下几点情况：是什么意思？

Cracks in concrete engineering one of the most common diseases. The appearance of cracks, resulting in decreased strength of the concrete, weakening capacity in the continuing role of the force, the result is even more serious, and cause serious economic losses. However, if the crack is less than th

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The crack is in the concrete project one of most universal plant diseases.The crack appearance, the cause concrete intensity drops, the supporting capacity is weaken, in continues under the stress function, its result is more serious, simultaneously can create the serious economic loss.But if the cr

Crack is one of the most common diseases of concrete engineering. Cracks appear, cause falling concrete strength and bearing capacity of weakening, continues under the action of the force, the result is even more serious, as well as causing serious economic losses. But if it cracks less than standar