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knotty考试真题 - 繁体字在线
knotty
英 ['nɒtɪ]
美['nɑti]
- adj. 棘手的，难解决的；[木] 多节的；有结的
考试真题
- Einstein would furiously play his violin as a way to think through a knotty physics problem.
出自-2010年12月阅读原文