Stupid and dull by nature 根性顽钝
stupid by nature
天生愚蠢
以上为机器翻译结果，长、整句建议使用 人工翻译 。
If you are not feeling frustrated and stupid in your Ph. D study, you are not trying hard enough, and are, by the very nature of good research, failing.
如果你在读博士期间，你没有感觉到沮丧或者愚蠢，那么你肯定不够努力，并且从好科研的本质来讲，是很失败的。
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