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- Secondary crack, reared ridge, and microcrack in the front of the main crack tip can all hinder crack propagation during low cycle fatigue. 撕裂棱、裂纹前端微裂纹的桥接等因素是阻滞主裂纹扩展的主要机制。
- Crack spreading area and transient breaking are observed, typical fatigue striations, fatigue steps and secondary cracks are observed on some of the fractures. 微观上在少数油管断口中观察到了典型的疲劳辉纹，在很多断口上观察到了疲劳台阶和二次裂纹。
- The fatigue cracks initiate in a intergranular manner and propagate in a transgranular manner, which stages are separated by secondary cracks. 实验结果表明疲劳载荷下的橡胶裂纹首先沿片晶结合面萌生，然后穿晶扩展破坏，且存在次生裂纹。
- Discriminating Between Primary Cracking Gas and Secondary Cracking Gas 天然气初次裂解与二次裂解作用判识
- A little crack detracts from the value of the vase. 小小的裂痕减损那个花瓶的价值。
- The marchers jumped off at the crack of dawn. 行军队伍在破晓时出发了。
- The riot police started to crack down on them. 防暴警察开始对他们采取镇压行动。
- That was a cracking shot he played. 他这一下打得妙极了。
- You'll crack up if you go on working so hard. 你继续这样拚命干下去，身体会吃不消的。
- Her age is of secondary interest. 她的年龄不太重要。
- There's a lot to be done, so let's get cracking. 工作很多，咱们开始干吧。
- Police are cracking down on drug dealers. 警方现对贩毒分子严惩不贷。
- They sat by the fire, cracking jokes. 他们坐在火堆旁讲笑话。
- Have another crack at solving this puzzle. 再试一试把这个难题解决了吧。
- She made a crack about his fatness. 她取笑他肥胖。
- In secondary school, children get more advanced knowledge. 在中学，孩子获得更深一些的知识。
- There is a crack in this window. 这扇窗户上有个裂纹。
- A secondary matter; a side issue. 次要的第二位的事; 较次要的问题
- She got up at the crack of dawn. 天刚亮她便起床了。
- Mary found knitting a hard nut to crack. 玛丽发现编织并非易事。
