Plethysograph
血色计
🗣️ 情景例句
Will he be OK, Dad?
他会没事吗， 爸爸？
Oh, I'll probably just stay home.
哦，我可能就呆在家里了。
Ice is only as safe as the water from which it is made,
冰块只有当制造冰块的水安全时才是保险的，