复数： dissertations

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She later sought his advice for her ph.d. dissertation .

她后来曾就自己的博士论文向他征询过建议。

So she spent seven years getting a phd , writing an award-winning dissertation in the process .

所以她花了7年时间获得了博士学位，在此期间也完成了一份获奖的学术论文。

When mr. petraeus assumed the command of the war in afghanistan in 2010 , she decided to turn her dissertation research into a book .

2010年彼得雷乌斯成为阿富汗战争指挥官后，她决定将自己的博士文论研究写成一部书。

I just mentioned my doctoral dissertation .

我刚才提到了我的博士论文。

In fact , he wrote his dissertation on the midocean ridge .

实际上，他的博士论文就是关于中央山脊的研究。