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有的喜欢温润，有的喜欢清凉，塑料与金属各有各的优点吧。还有关键的一点就是指纹的原因，看起来漂漂亮亮的外壳一把下去满眼都是指纹，这绝对会影响心情吧。但是对于工业飞速发展的今天，工程师们自然也有办法。比如防指纹镀膜玻璃，或是给材料表面镀上含氟表面图层，亦或是进行一些特殊表面处理，但是，有时候为了平衡，可能效果就没那么完美了。
Some like warm and moist, others like cool. Plastic and metal have their own advantages. Another key point is the reason for fingerprints. It looks like a beautiful shell is full of fingerprints, which will definitely affect your mood. But with the rapid development of industry today, engineers naturally have ways. For example, anti fingerprint coated glass, or fluorine-containing surface layer on the material surface, or some special surface treatment, but sometimes the effect may not be so perfect in order to balance.
此外，塑料外壳确实比较耐用，铝合金材质外壳比较容易划伤，但鱼与熊掌不可兼得，目前来说仍然没有任何一种称得上完美的材料，无论是塑料还是金属材料抑或其他材料都有改进提升的空间。
In addition, the plastic shell is indeed more durable, and the aluminum alloy shell is easier to scratch, but you can't have both fish and bear's paw. At present, there is still no perfect material, whether plastic, metal or other materials have room for improvement