记者把那个关键线索草草记在了一张小纸片上。

The journalist jotted down the crucial tip on a ___scrap of paper.

搜查了整个犯罪现场后，侦探找不到一丝一毫的证据。

After searching the entire crime scene, the detective couldn't find a single ___scrap of evidence.

那名士兵对他的敌人没有表现出丝毫的怜悯。

The soldier showed not a ___scrap of compassion for his enemies.