There are three stages in writing. The first is the preparatory stage.

写作分为3个阶段: 首先是准备阶段.

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This is the preparatory stage of the materials used.

这是用料准备阶段.

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The South North Water Transfer Project has come to the substantial preparatory stage.

备受人们关注的南水北调工程已进入实质性筹备阶段.

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