Lisa stood next to her tall silent grandfather and watched her parents drive off, leaving her behind.
丽萨站在她高大沉默的爷爷旁边，看着她父母开车离开，把她留了下来。
If an old hard drive is making noise you can either de-fragment it and see if that reduces the sound, or you can buy a new, silent hard drive.
如果一个老硬盘有噪声，你可以整理一下硬盘碎片，看声音是否减少，也可以买一个新的、安静的硬盘。
The meshing theory and application of the dual meshing silent chain drive are investigated to reduce the polygon movement and the meshing contact.
本文通过分析齿形链传动过程中存在的多边形效应和啮合冲击，开展了双面啮合齿形链传动啮合理论与应用研究。
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