airtight seal短语¹³¹⁶²⁰⁺³ 基本例句 空气密封,气密 Take a normal breath, cover the victim's mouth with yours to create an airtight seal, and then give two, one- second breaths as you watch for the chest to rise. 先做一次常规的呼吸，用你的嘴封住患者的嘴形成一个密闭通道，然后做两次，历时一秒钟的呼吸，同时要观察到患者的胸部上升。 blog.sina.com.cn