Brief Description of works - the works to be carried out under the Excavation Permit.

工程简介—挖掘准许证所包括的工程范围。

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The description for one of the top flashcard apps even says that the developer only works on the app part-time as hobby.

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This is a high level description, with a lot of details glossed over, but that is the gist of how it works.

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