驾驶员将车速从第三挡调低到第二挡。

The driver changed down from third to second (gear).

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三峡工程第三期截流工程是确保实现初期围堰挡水发电及同时修建右岸大坝和电厂的关键性工程。

The TGPs third stage river closure is a key works for the early stage cofferdam supported power generation and guarantee of the successive construction of hydroelectric plant and dam at right bank.

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