The trench is most sharply defined on the eastern (continental) side: depth plunges rapidly from a few hundred meters (light blue) to several thousand meters (deep blue).
海沟最明显的界限是东部靠大陆的地方：海水深度突然从两三百米（浅蓝色）迅速降低到数千米（深蓝色）。
The typical trench system in World War I consisted of a series of two, three, four, or more trench lines running parallel to each other and being at least 1 mile (1.6 km) in depth.
第一次世界大战时典型的堑壕体系由2至4条以至更多的一系列壕沟组成，壕沟之间彼此平行，而且纵深可以达到1英里（合1.6公里）。
By 1918 the Germans had constructed some trench systems that had a depth of 14 miles (22 km).
1918年时，德军已经建造了一些纵深达到14英里(和22公里)的堑壕体系。
However, for a wide trench, the width of etched profile will increase with the increase of its depth since the deformation of boundary layer in plasma.
然而，对一个宽槽来说，由于等离子区内边界层的变形，其蚀刻宽度会随着蚀刻深度的增加而增加。
Optimization for excavation depth of foundation trench is carried out and notable economic benefit is achieved.
并且对基槽开挖深度进行优化设计，取得了显著的经济效益。
Up until now, the deepest excavated trench is 1.5m in depth.
截止目前为止，发掘的探方最深1.5米。
Up until now, the deepest excavated trench is 1.5m in depth.
截止目前为止，发掘的探方最深1.5米。
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