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19. 特殊符号

依赖模块: pymdownx.smartsymbols

用法	效果
(tm)	™
(c)	©
(r)	®
c/o	℅
+/-	±
-->	→
<--	←
<-->	↔
=/=	≠
1/4 3/5	¼ ⅗
1st 2nd 3rd	1st 2nd 3rd