但需要在定期的牙科检查时对它进行检查，以确保它们未被磨损掉。
But they need to be checked at regular dental check-ups to make sure they are not chipped or worn away.
这种边缘增强效果说明我们的社交网络边缘是疏松、易磨损的，就像用钩针编制的毛衣尾部松掉的纺线一样。
These reinforcing effects mean that our social fabric can fray at the edges, like a yarn that comes loose at the end of a crocheted sweater.
该系统正在迅速落伍，由于DIS和有更少运动部件和磨损因素的每罐线圈的引入，测量火花塞的电压是要求在不同条件下能跳掉插头。
This system is quickly becoming obsolete due to the introduction of the DIS and coil per cylinder systems with fewer moving parts and wear factors.
镜头有正常使用所造成的划伤、磨损和一点掉漆。
The lens has scratches, scuffs, and a little bit of paint loss from typical use.
镜头有正常使用所造成的划伤、磨损和一点掉漆。
The lens has scratches, scuffs, and a little bit of paint loss from typical use.
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