波浪号
波浪号（tilde、~）是一个有交关多用场个标点符号。原本伊作为缩写符号个一个字母，但亦有作为变音符号或单一文字个用场。拉数学上，伊是代表等价关系个数学符号。拉最后一个用场里向（尤其是拉辞书学里），伊有辰光会被当做代字号。
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