普及
verb A2- to spread extensively
- to generalize
- widespread
- popular
- universal
- ubiquitous
- pervasive
Its characters
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然而，竹简笨重，丝绸昂贵，两者都难以普及。
纸的普及不仅降低了书写的成本，而且使知识不再为少数人所独有。
其次，电子产品的普及也给孩子们的视力带来了不好的影响。
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