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词汇 pains
释义 pains /penz; peɪnz/
n [plural 复数]
be at pains to do sth/take pains to do sth to try very hard to do something 不遗余力地做某事:
He was at pains to emphasize the advantages of the new system. 他不遗余力地强调这种新体系的优点。
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