The main danger in high-rise construction lies in the deep depth of foundation digging, the great height of work place, the much crossover work, the long time for a project.

高层建筑施工存在危险的主要方面有：基础开挖深度深、作业高度高、交叉作业多、施工工期长。

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Communication with native speakers improved my oral skill a lot, and translation work laid a solid foundation for my deep understanding of English.

同那些讲英语的人交流大大提高了我的口头表达能力，翻译工作为我对英语的深刻理解打下了坚实的基础。

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This article treats the intrinsic paradox of the division of work and cooperation as the deep foundation of monopoly's formation.

本文把分工协作的内在矛盾作为垄断形成的深层基础。

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