MEANING/意义
苦心
EXAMPLES/列句
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我明白他的苦心I understand the pains he has taken.
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他们对这次的活动煞费苦心。They take great pains over this activity.
COMBINATIONS/组合
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苦心孤诣to make extraordinarily painstaking efforts
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苦心思索to ponder with painstaking efforts
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煞费苦心with much ado,take great pains over...