4個stroke 換氣，那就是單側換氣了，是不是憋氣時間長了。我兩側換氣，三個stroke 換一次
WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.
Copyright ©1998-2025 wenxuecity.com All rights reserved. Privacy Statement & Terms of Use & User Privacy Protection Policy
