For example, the audience learns through a letter or through someone else's conversation who this mysterious gentleman is and why he left the town many years before.

例如，观众通过一封信或其他人的谈话得知这位神秘的绅士是谁，以及他多年前为什么离开这个城市。

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For example, in the past years AT&T have dismissed thousands of managers and employees through downsizing, though many of these people have twenty or more years of loyal employment with the firm.

例如，在过去的几年中，AT&T裁掉了成千上万的经理和雇员，而他们中有许多人已在该公司忠心耿耿工作了二十年甚至更长时间。

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Through practice experience and observation in spot for many years, discovers that it is unavoidable to produce big crack or small crack in the concrete construction.

通过多年的现场实践经验以及现场观察，发现混凝土施工中难免会产生许多或大或小的裂缝。

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