bù cí láo kǔ
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Chinese dictionary
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  • v.to do something troublesome and tiring without declining; to spare no pains

    • bù cí láo kǔ de fǎn fù shì yàn

      不辞劳苦反复试验

      painstaking process of trial

    • tā wèi wǒ ér bù cí láo kǔ

      不辞劳苦

      He took trouble on my account.