When a place is airless, the air inside feels still and heavy, as if no window has been opened for a long time. A shut classroom after lunch, a small bedroom in summer, a crowded underground station — you may feel sleepy, warm in an unpleasant way, or a little sick, because fresh air is not moving.

When a place is airless當一個地方airless, the air inside裡面的空氣 feels still and heavy感覺又悶又重, as if好像 no window has been opened好久沒開窗 for a long time一樣. A shut classroom after lunch午飯後關著的教室, a small bedroom in summer夏天的小臥室, a crowded underground station擁擠的地下車站 — you你 may feel sleepy可能會想睡, warm in an unpleasant way覺得悶熱不舒服, or a little sick或有點不舒服, because因為 fresh air新鮮空氣 is not moving沒有在流動.

In everyday talk many people just say stuffy; airless is a little more like a book, a careful description, or a complaint said slowly. You can speak of an airless room, an airless night, or an airless atmosphere (the feeling in a room, not the sky).

In everyday talk在日常對話裡, many people很多人 just say stuffy只會說stuffy; airless airless is a little more like a book比較書面一點, a careful description一種謹慎的描述, or a complaint said slowly或慢慢說出的抱怨. You你 can speak of可以說 an airless room airless room, an airless night airless night, or an airless atmosphere或airless atmosphere (the feeling in a room那是房間裡的感覺, not the sky不是指天空).

Though actually, scientists also use airless for a place with no air at all, like the moon: nothing to breathe, no wind. That is the same idea stretched to the end — not “bad air,” but no air.

Though actually不過其實, scientists科學家 also use airless也會用airless for a place形容一個地方 with no air at all完全沒有空氣, like the moon像月球一樣: nothing to breathe沒有東西可以呼吸, no wind沒有風. That那 is the same idea就是同一個概念 stretched to the end延伸到極致 — not “bad air,”不是「空氣品質差」 but no air而是「沒有空氣」.

The meaning you meet first is the stuffy one. It is not a rude word, and it is not “air that is less,” as if you were doing maths.

The meaning你最先遇到的意思 you meet first is the stuffy one是「悶」那個意思. It它 is not a rude word不是一個粗魯的字, and it而且它 is not “air that is less,”也不是「比較少的空氣」 as if好像 you were doing maths你在算數學一樣.