1.niggling doubt/worry/suspicion etcWORRIEDa slightdoubt etc that you cannot stop thinking about 使人心烦的疑虑/担心/怀疑等SYN nagging
Examples from the Corpus
niggling doubt/worry/suspicion etc• Always, in the background, in the dimrecesses of her mind, there had been that niggling doubt.• Of course, this is usually so, but I am having little niggling doubts about such a sweepingstatement.• Almost immediately, the fretting, niggling worries and the sense of fearfulanticipation began to return.• And here a niggling doubtenters the mind.• There was, however, a niggling doubt in the minds of some of the jurors.• Nor did it remove the niggling suspicion that Isabel was hiding something.• There remains the niggling doubt that this delay has something to do with our muddledsentimentality towards animals.
2.a nigglinginjury or problem is a slight one that does not go away 〔伤害或问题不严重却不断〕烦人的,隐隐不去的
Examples from the Corpus
niggling• We flew back to Heathrow; it had not been a happytrip for me, full of niggling and snideremarks.• There was, however, a nigglingdoubt in the minds of some of the jurors.• The suspect seemed to have proved his innocence, but a niggling doubt remained in my mind.• a niggling doubt• Always, in the background, in the dimrecesses of her mind, there had been that niggling doubt.• However, the fabulous goal-kicker is now much more mobile than he was last year when a nigglinggroin injury affected him.• Croft took a year's sabbatical to recover from a string of niggling injuries and is now raring to go again.• Another niggling problem is their inconsistentapproach to repeats.• Lowell felt a niggling sense of betrayal.• Nor did it remove the nigglingsuspicion that Isabel was hiding something.• I couldn't shake off a nigglingworry. Had I forgotten to lock the office door?