I explained that I had been studying theoretical computer science and mathematics at a high-level for the past decade, much of it spent right here at MIT.
我曾说过在过去十年我学过高等理论计算机科学和数学，大部分时间正是在MIT。
They practised cautiously, after supper, with right fair success, and so they spent a jubilant evening.
晚饭后他们小心地练习，取得了不错的成绩，因此他们度过了一个欢乐的夜晚。
Margaret spent over an hour looking at cards, but she could not find the cards that were right.
玛格丽特花了一个多小时看卡片，但她找不到适合的卡片。
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