發送短信 : Trends in Mandarin Tonal Changes: From 1932 to 1963-85

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| || | ||   / _ \\  | |  | ||   / _ \\   \ \\/ // 
| || | ||  / //\ \\ | |/\| ||  | / \ ||   \   //  
| \\_/ || |  ___  |||  /\  ||  | \_/ ||   / . \\  
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  `---`   `-`   `-` `-`   `-`   `---`    `-`  --`