1.be exposed to 曝光，暴露，遭受
例句：Much of what they are exposed to is superficial.
他们接触到的东西大都很肤浅0%|)o0[)R_PZ。
2.air vent 通气孔，排气道
例句：A unique air vent system which helps prevent nipple collapse.
奇特的导气系统防备奶嘴塌陷e]xfx)6CIlOF*Y=B&F。