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a skylight in [room/roof]
skylight 指屋顶或天花板上的窗户，用于采光。
The kitchen has a skylight in the ceiling.
厨房的天花板上有一扇天窗。
天窗
skylights — plural of skylight
先理解核心含义，再看它在真实句子里的用法。
天窗
a window in a roof that lets in daylight
The kitchen has a skylight in the ceiling.
厨房的天花板上有一扇天窗。
屋顶或天花板上的窗、穹顶或开口,用于引入自然光。
A window, dome, or opening in the roof or ceiling, to admit natural light.
屋顶上的窗户以引入日光
a window in a roof to admit daylight
天空漫射辐射——太阳辐射经大气中的分子或悬浮物散射后到达地球表面的部分。
Diffuse sky radiation—solar radiation reaching the earth's surface after having been scattered from the direct solar beam by molecules or suspensoids in the atmosphere.
熔岩管上部的开口,可看到内部熔岩。
A hole in the upper part of a lava tube, yielding a view of the lava within.
We opened the skylight in the kitchen to let in some fresh air.
我们打开了厨房的天窗，让新鲜空气进来。
Rain was drumming on the skylight above the stairs.
雨点敲打着楼梯上方的天窗。
The room felt brighter after we cleaned the skylight.
我们擦干净天窗后，房间显得亮堂多了。
skylight 指屋顶或天花板上的窗户，用于采光。
The kitchen has a skylight in the ceiling.
厨房的天花板上有一扇天窗。
表示安装天窗时常用 install 或 fit。
They installed a skylight to brighten the hallway.
他们安装了一扇天窗来照亮走廊。
透过天窗看某物时用 look through。
We looked through the skylight at the stars.
我们透过天窗看星星。
let in 表示让光线进入。
The skylight lets in plenty of natural light.
这扇天窗透进大量自然光。
Not this
There are many skylight in the roof.
Use this
There are many skylights in the roof.
skylight 是可数名词，many 后要接复数形式 skylights，不能保留单数。
Not this
The room has a sky window.
Use this
The room has a skylight.
中文“天窗”对应的英文是固定词 skylight，不能按字面拆成 sky + window；sky window 不是英语习惯表达。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
安装天窗
We decided to install a skylight in the bathroom hallway.
我们决定在浴室走廊安装一扇天窗。
打开天窗
Could you open the skylight to let in some fresh air?
你能打开天窗让新鲜空气进来吗？
玻璃天窗
The glass skylight above the stairs brightens the whole area.
楼梯上方的玻璃天窗照亮了整个区域。
屋顶天窗
A roof skylight is a great way to add natural light to an attic.
屋顶天窗是给阁楼增加自然光的好办法。
从天窗透进来的光
The morning light through the skylight wakes me up naturally.
早晨从天窗透进来的光自然地把我唤醒。
发长 /aɪ/ 音 (如 high, light)
Same pattern, same sound
Use skylights naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：sky（天空）+ light（光）组合成天窗，屋顶的窗让天光洒进来。
语域：neutral 常见场景：建筑、室内设计、日常对话 skylight 是中性常用词，多用于描述屋顶上用于采光的窗户，在建筑、室内设计和日常对话中都比较常见。
这些词都与 skylight 押韵：daylight、moonlight、sunlight、flashlight、highlight 都以 /laɪt/ 结尾，night 以 /naɪt/ 结尾（元音相同）。注意形近但读音不同的词，如 skyline /ˈskaɪlaɪn/，它和 skylight 开头相同，但结尾是 /laɪn/ 而不是 /laɪt/。
Dictionary facts from ECDICT, WIKTIONARY.