這個是重力作用。樓主那個據說是提高腹腔壓力，把食物給壓出來。

來源: 天乙貴人於 2025-10-07 11:57:47 [舊帖] [給我悄悄話] 本文已被閱讀：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.