空气
the invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen
示例:• The fresh air felt good after being indoors all day.在室内待了一整天后,新鲜空气让人感觉很好。• Birds fly through the air.鸟儿在空中飞翔。同义词:atmosphereoxygengas
空气
the invisible gaseous substance surrounding the earth, a mixture mainly of oxygen and nitrogen
示例:• The fresh air felt good after being indoors all day.在室内待了一整天后,新鲜空气让人感觉很好。• Birds fly through the air.鸟儿在空中飞翔。同义词:atmosphereoxygengas