A dirty drivetrain causes poor shifting and unnecessary wear to expensive parts.
肮脏的传动链会引起不良的变速，并对昂贵的零件造成不必要的磨损。
Therefore, attention is not appropriate for the case and bracelet in unnecessary wear also let us quartz watch looks new needed.
为此，适当的注意不要让表壳和表链参与到无谓的磨损中也是让我们的石英表“看上去很新”所需要的。
Not only am I obliged to wear heels and a posh frock, I am expected to tackle a wood-pigeon salad with an unnecessary amount of cutlery.
我不但被迫穿高跟鞋和优雅的连衣裙，还被要求用一堆刀具吃林鸽沙拉。
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