I know that you've been studying chimpanzees for thirty years now

　　我知道你研究黑猩猩至今已有30年了。

　　I invite every citizen to carefully study the document.

　　我請(qǐng)每位市民都仔細(xì)研讀該文件。

　　They totally overlooked the study of the subject.

　　他們完全忽視了對(duì)這個(gè)問題的`研究。

　　This is outside the range of our study.

　　這不屬于我們研究的范圍。

　　The study also demonstrated a direct link between obesity and mortality

　　該研究還表明了肥胖癥和死亡率之間存在直接的聯(lián)系。

　　Several colleges in our study have rigid rules about student conduct

　　在我們的研究中，有幾所大學(xué)制定了嚴(yán)格的學(xué)生行為規(guī)則。

　　Doctors study the structure of the human body.

　　醫(yī)生研究人體構(gòu)造。