A skylight is a window set into the roof, so daylight comes down from above instead of in from a wall. You find them in top-floor rooms, stairwells, art studios, and old factories — anywhere the roof is the only place left for a window.

A skylight is a window set into the roof天窗指的是裝在屋頂上的窗戶 so daylight comes down from above instead of in from a wall讓陽光從上面照下來，而不是從牆壁照進來 You find them in top-floor rooms, stairwells, art studios, and old factories你會在頂樓房間、樓梯間、畫室、老工廠裡看到它 anywhere the roof is the only place left for a window凡是屋頂是唯一能裝窗戶的地方，都可能有它

Some are just glass and stay shut; some tilt open for air. House ads love them because a dark attic can suddenly feel like a real room.

Some are just glass and stay shut有些只是一片玻璃、一直是關著的 some tilt open for air有些可以傾斜打開來通風 House ads love them房屋廣告很愛提到它 because a dark attic can suddenly feel like a real room因為一個陰暗的閣樓，裝了它突然就能感覺像一間真正的房間

Though actually, builders sometimes split hairs: a “roof window” may be one you can climb out of, and a “skylight” one that is only there for light. In ordinary talk, people call both skylights.

Though actually不過實際上 builders sometimes split hairs營建業有時候會分得很細 a "roof window" may be one you can climb out of"roof window"（屋頂窗）可能指的是可以爬出去的那種 and a "skylight" one that is only there for light而"skylight"則只是用來採光的那種 In ordinary talk, people call both skylights但日常講話裡，大家兩種都叫skylight

It is a calm, everyday word, not slang and not fancy.

It is a calm, everyday word這是個平靜、日常的字 not slang and not fancy不是俚語，也不花俏