The pit ultimately reached 6.5 meters, and we found several construction episodes that date to the earliest occupation of the site.

这个坑最终达到了6.5米，我们发现了好几个可追述到此遗址最早居住时期的建筑片段。

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Construction is a high hazard occupation.

建筑业是一个高危害的职业。

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Question1: With the gradual improvement of construction in habitant community, security guard has become more and more professional occupation. Do you agree on it?

问题1：随着居住小区建设的逐步改善，保安越来越成为个专门的职业了。你同意这种看法吗？

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