嬰兒肺活量低於成人，可以持續放聲大哭，在於天生正確發聲方法，可惜成年後逐漸放棄了這種方法

來源: 移花接木於 2021-06-01 05:13:31 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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