“一丝”用英语怎么说？

我的声音听起来心平气和、不露一丝感情，这让我自己颇感惊讶。My voice surprised me; it was even and emotionless.女服务员看着他，脸上带着一丝局促不安的微笑。The maid looked at him, a nervous smile on her face.他的眼里是不是闪过一丝讥讽？Was there a glint of mockery in his eyes?...