niggling

adj.

不断烦扰的；（一件工作）费神的；难办的；繁琐的

v.

为小事操心，吹毛求疵( niggle的现在分词 )；不断地烦扰；

1. I work hard and I always train even if I've got a niggling injury.
   我很努力，即便有点小伤也还坚持训练。
2. I don't see why they should be niggling over paying a few pounds into the fund.
   我不明白他们为什么对这笔基金投入几镑钱而如此在乎。

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