be unsparing in one's efforts
遗余力
宽恕的,留情的让步的;屈
的;be unsparing in one's efforts
遗余力
an unsparing superior officer; unsparing criticism.
一名苛严的上级军官；留情面的批评
he is unsparing in his criticism of the arms trade.
他对军火交易进行无情批评。
she had won her mother's unsparing approval.
她赢
慷慨的赞许。
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