submit their theses
提交论文
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Sure enough. Every postgraduate student has to write a graduate thesis. The students must submit their theses and explain their arguments orally before the tutors.
那当然。每个研究生都得写毕业论文，把它提交给导师并且进行答辩。
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