老师 讲 过 了
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老师 讲 过 了 .
l au̯˧˩˧ ʂ ɻ̩˥ WORD_BOUNDARY tɕ j a˧˩˧ ŋ WORD_BOUNDARY k w o˥˩ WORD_BOUNDARY l ɤ WORD_BOUNDARY 
老 师 WORD_BOUNDARY 讲 WORD_BOUNDARY 过 WORD_BOUNDARY 了 WORD_BOUNDARY