但蟹主要在夜间活动，当它们不能在黑夜的沙滩漫游时，就在它们隐藏的冲浪线的附近挖些小坑，似乎在观察，在等待大海带给他们什么。
But the crabs are chietly nocturnal, and when not roaming the night beaches they dig little pits near the surf line where they hide, seemingly watching and waiting for what the sea may bring themm.
介绍了北京地铁5号线磁器口车站浅埋暗挖隧道中洞法施工技术，对地表监测数据进行了分析。
The article introduces the construction technology of center drift method for shallow excavation tunnel in Beijing Metro Line 5, analyses the monitored data for the earths surface.
该文提出了一种根据设计断面中“地基线”和“工程轮廓线”来计算挖填方量的算法。
We present the algorithm according to the configuration line and ground line of cross section.
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