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1·This case has been intensively studied.

对这一个案已进行深入研究。《牛津词典》

2·He studied politics and economics at Yale.

他曾在耶鲁大学学习政治学和经济学。《牛津词典》

3·He has not studied mechanics or engineering.

他没有学习过力学或者工程学。《柯林斯英汉双解大词典》

4·He studied law.

他学习法学。《柯林斯英汉双解大词典》

5·He studied philosophy and psychology at Yale.

他在耶鲁大学学习哲学和心理学。《柯林斯英汉双解大词典》

6·Debbie studied her friend's face for a moment.

黛比端详了一会儿她朋友的脸。《柯林斯英汉双解大词典》

7·Coincidentally, they had both studied in Paris.

碰巧的是，他们俩都在巴黎学习过。《牛津词典》

8·He studied conscientiously and enthusiastically.

他认真积极地学习。《柯林斯英汉双解大词典》

9·Many toxic effects can be studied at the cellular level.

许多毒性作用在细胞阶段就可加以研究。《柯林斯英汉双解大词典》

10·Researchers studied moles on those aged between 12 and 50.

研究者们研究了12岁到50岁的人身上长的痣。《柯林斯英汉双解大词典》

(1)case study个案研究；案例研究

(1)course of study学科；学习的进程；研究课程

(1)further study进一步研究；深造；继续教育，进修

(1)experimental study试验研究；实验性研究

(1)study hard努力学习

(1)comparative study比较研究；对比研究