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近义词与同义词
按词义分组列出，使用时请结合具体语境。
a slight amount or degree of difference; "a tad too expensive"; "not a tad of difference"; "the new model is a shade better than the old one"
(nontechnical usage) a tiny piece of anything
a small but noticeable trace of some quality that might become stronger; "a spark of interest"; "a spark of decency"
a small amount of residue