niggled
v.
为小事操心，吹毛求疵( niggle的过去式和过去分词 );
不断地烦扰;
例句:
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The puzzle niggled away in Arnold's mind.
这个谜团在阿诺德脑海里挥之不去。
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His untidiness constantly niggled her.
他邋邋遢遢总惹她讨厌.
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Mary niggled over everything until my patience was worn out.
玛丽事事吹毛求疵,叫我好不耐烦.
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She niggled with small brushes while I tried...to get her to paint with more breadth.
来自A. Y. Jackson