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）。

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To discuss them with any sorts of depth would require at least another lecture or two.

要对它们之中任何一类进行深入地讨论,都至少还需要一到两节课的教学内容。

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The picture emerging from the research is deeply troubling, at least to anyone who values the depth, rather than just the velocity, of human thought.

研究得出的数据图让人深感不安，至少对那些认为人类思想的深度胜于速度的人来说是如此。

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In re-signing Jackson, the Bills have, at the very least, added depth to the quarterback spot.

WSJ: Bills re-sign QB Jackson; Fitzpatrick staying

Materials to bring - floristry scissors and your own container (the size of a dinner plate and at least 2 inches in depth).

BBC: Carols in Thatcham

And Americans are doing more than just clicking headlines on their mobile devices: 73% of adults who consume news on their tablet read in-depth articles at least sometimes, including 19% who do so daily.

ENGADGET: Pew Research finds 22 percent of adults in US own tablets, low-cost Android on the rise