不遗余力
[词典] spare no effort [efforts; pains]; be all out; be unsparing in one's efforts; spare no effort;
[例句]政府决定不遗余力地彻底调查这个案子。
The government is determined to spare no effort in investigating this case thoroughly
不遗余力
spare no efforts to do something
make unremitting effots
例句：
They spared no effots to help those victims rebuild their homeland.
他们不遗余力地帮助灾区人民重建家园。
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