1. The result showed that the cracking was caused by the fold-ing and nonmetallic inclusions of steel pipe. 结果表明，钢管中存在折叠及较严重非金属夹杂物是导致开裂的主要原因。
2. Firstly, this paper analyzed the cause of cracking of shield tunnel segments and its influence on the durability of segments. 论文首先对隧道管片结构裂缝的成因及其对管片结构耐久性的影响进行了分析。
3. Mechanical calculation of cast iron rammer was made by using the finite element method and the cracking destruction was analyzed. 采用有限元法对铸铁夯锤进行了受力计算，并对其在使用中的开裂破坏进行了分析。
英英解释
n.
1. a sudden sharp noise
2. the act of cracking something
3. the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of low adj.
1. very good
