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  _  _    _    _               ______    ______  
 | \| || | || | ||     ___    /_   _//  /_   _// 
 |  ' || | || | ||    /   ||   -| ||-   `-| |,-  
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 |_|\_||  \____//     \__ ||  /_____//    |_||   
 `-` -`    `---`       -|_||  `-----`     `-`'   
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Text this: 声调的不稳定性在新加坡华语里不同年龄层的表现 = A SURVEY OF TONAL INSTABILITY IN SINGAPORE MANDARIN OVER A SPECTRUM OF AGES