adj.琐碎的；费神的
n.琐碎
动词niggle的现在分词形式.
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。
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。
