A variable displacement pump could save energy during the long holding time.

变量泵可在长的保压时间内节省能源。

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During the early years of her recovery, she was depressed for a long time.

在她早年的康复过程中，她有很长一段时间一直很沮丧。

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During the early years of her recovery, she was depressed for a long time.

在她早年的康复过程中，她有很长一段时间一直很沮丧。

youdao