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a sunbeam + verb
sunbeam 是可数名词，表示“一缕阳光”，常用单数加冠词 a。
A sunbeam fell across the floor.
一束阳光照在地板上。
阳光；日光
先理解核心含义，再看它在真实句子里的用法。
阳光；日光
a ray of sunlight
A sunbeam fell across the floor.
一束阳光照在地板上。
阳光的光线；尤指一道界限分明、狭窄且(相对于周围光线)强烈的阳光(例如通过尘埃颗粒间衍射而显现)。
A ray of sunlight; especially, a demarcated, narrow, and intense (relative to ambient light) ray of sunlight (as revealed by, for example, its diffraction among dust particles).
各种 Curetis 属的灰蝶科蝴蝶。
Any of various lycaenid butterflies of the genus Curetis.
各种 Aglaeactis 属的蜂鸟。
Any hummingbird of the genus Aglaeactis.
A sunbeam came through the window and lit up the dust in the air.
一道阳光透过窗户照进来，照亮了空气中的灰尘。
The cat stretched out in a warm sunbeam on the floor.
猫在地板上温暖的阳光里伸了个懒腰。
She watched sunbeams dance on the surface of the lake.
她看着阳光在湖面上跳跃。
sunbeam 是可数名词，表示“一缕阳光”，常用单数加冠词 a。
A sunbeam fell across the floor.
一束阳光照在地板上。
表示“在阳光里”时，常用介词 in。
Dust floated in the sunbeam.
灰尘在阳光中飘浮。
描述阳光照射时，常用 stream、shine 等动词。
Sunbeams streamed through the clouds.
阳光穿过云层照射下来。
Not this
Several sunbeam came through the window.
Use this
Several sunbeams came through the window.
sunbeam 是可数名词，表示“一道阳光”，在 several 后必须用复数 sunbeams。
Not this
What a sunbeam day!
Use this
What a sunny day!
sunbeam 是名词，不能像 sunny 那样作定语修饰 day；表示“阳光明媚的”要用形容词 sunny。
Not this
The cat is sleeping under the sunbeam.
Use this
The cat is sleeping in the sunbeam.
汉语“在阳光下”的“下”不能直译为 under；在光线中应用 in，表示“在……的光线里”。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
金色的阳光；金色光线
A golden sunbeam fell across the old wooden floor.
一道金色的阳光落在旧木地板上。
清晨的阳光
Morning sunbeams streamed through the curtains.
清晨的阳光透过窗帘射了进来。
捕捉阳光；迎向阳光
The little cat moved to catch the sunbeam on the sofa.
小猫挪到沙发上，想捕捉那一缕阳光。
在阳光中起舞
Dust motes danced in the sunbeams coming through the window.
尘埃在透过窗户射进来的阳光中飞舞。
Use sunbeam naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
太阳（sun）发出的一束光线（beam），连在一起就是sunbeam。记住：不是整片阳光，而是“一束”。
语域：neutral 常见场景：自然光线描写、文学性文本 该词属于中性词，既不过于正式也不俚俗，但比较常见于书面或文学性描写中；日常口语里通常会说 sunlight 或 ray of sunshine，使用 sunbeam 时多带有一定的画面感。
beam、gleam、cream、dream、seam 都以 -eam 结尾，读 /iːm/，与 sunbeam 中非重读的 -beam 部分读音相同；但它们并不和 sunbeam 整体押韵，因为 sunbeam 的重音在第一个音节 sun- 上（/ˈsʌnbiːm/）。留意 sunbeam 的结尾是 /biːm/，不是 bean 的 /biːn/。
Dictionary facts from ECDICT, WIKTIONARY.