Many toxic effects can be studied at the cellular level.
許多毒效可以從細胞層次上去研究。
She studied chemistry for three years.
她學了三年化學。
I studied English and Drama at college.
我在大學學的是英語和戲劇。
My brother studied at the Royal College of Art.
我哥哥曾就學于皇家美術學院。
The report found that 30% of the firms studied had failed within a year.
據(jù)報告稱，受調查的公司有30%一年內倒閉了。