Due to cold damage, different cracks, crosswise crack, vertical crack and irregular crack, occurred to varying degree after the project had been used for a while.
工程交付使用一段时间后，由于冻害等原因，渠道衬砌产生不同程度的横向、纵向及不规则裂缝。
This book is an academic project of great importance aiming at a crosswise system of the Chinese logic in a reader of the text-book style.
构建中国逻辑的横向体系，编写出教科书式的中国逻辑读本，是一项极具意义的学术工程。
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