One third of the population doesn’t even have a gag reflex!
三分之一的人口甚至没有咽反射！
Spot on: Open your mouth, stick your tongue out, and use a toothbrush or your finger to find exactly where your gag reflex is.
定位：张开嘴，拉出舌头，并用牙刷或手指，准确地找到呕吐反射的触发点。
Spot on: Open your mouth, stick your tongue out, and use a toothbrush or your finger to find exactly where your gag reflex is.
定位：张开嘴，拉出舌头，并用牙刷或手指，准确地找到呕吐反射的触发点。
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