一线

a gleam of

1. 枪的瞄准器必须与射击目标对准成一线。
   The sights of the gun must be in alignment with the target.
2. 鉴定谋杀者的唯一线索是一枝吸了一半的香烟。
   The only clue to the identity of the murderer was a half-smoked cigarette.
3. 他心中仍闪出一线希望。
   A slender hope still flickered within him.
4. 从缝隙中他可以看到一线蓝天。
   Through a chink she could see a bit of blue sky.

一的英语翻译：

线的英语翻译：