a niggle of doubt
一丝挥之不去的疑虑
He gets the occasional niggle in his right shoulder.
他的右肩有时感到轻微的疼痛。
A doubt niggled at her.
一丝疑惑困扰着她。
It niggled him that she had not phoned back.
她没给他回电话，这使他有些不安。
Something was niggling her.
她有点烦心的事儿。
1.〈英〉为小事花费时间[操心]
1.to worry or annoy someone slightly but continuously
1.Most of the time, you take your office computers for granted. Okay, there's a niggle or two, but generally the IT folks can sort it out.
大多数时候，你并不重视办公室的电脑。好，这时电脑出现了一两个问题，但是通常来说搞IT的伙计们会解决它。
2.If you are elderly or disabled, that is a major consideration, but for most people it's just a minor niggle.
如果你有点年长或行动不方便，那是一条主要的考虑，但对大多数人说较少走。
3.they niggle endlessly over details and remain obstinately silent about his really great discoveries.
对于他的记叙中的细节尽力吹毛求疵，而对他的真正伟大的发现却闭口不提。
4.Only niggle was my room card kept failing every day I returned, could not unlock my door, and I had to ask the staff to reset it.
唯一让我闹心的就是房卡经常故障，每次回来，都不能开门，只能让服务员重新刷卡。
5."Piss off to Spain or Italy, where they niggle, pe or pull shirts, " he writes.
“特别反感西班牙队与意大利队，他们在场上爱找岔、假摔或者拉拽球衣，”他在书中写道。
6.The midfield maestro, 32, who has been nursing a left ankle niggle, said last night: "It's looking up. "
这位32岁的中场大师在昨晚左脚踝经过检查后表示：“一切都要视情况而定。”