A thread of light emerged from the keyhole.

从锁眼里透出一丝光亮。

《牛津词典》

A thread of light came through the crack in the door.

一道光线从门缝中透进来。

youdao

One night, at midnight, he woke up from dreaming, and saw that there was a thread of light coming from the crack in the window.

一天半夜，他从睡梦中醒来，把头侧向窗户时，发现窗缝里透进一丝光亮。

youdao

Messiaen adds slithery harmonics to end phrases, as if a silken thread of light carries the song that connects the earthborn boulders and birds to a celestial afterworld.

NPR: Messiaen At 100: A Song For The Solar System