借書：
book for reading assignment;
check out;
volume;
check for sb;
on the upper shelf;
a book hard to identify/ is missing;
has been misplaced
師生關係：學生問老師問題;學生尋求老師的`幫助;學生詢問老師對作業的意見;老師要求學生對論文列印錯誤等
do research for;
semester;
work as ones teaching assistant;
trouble a professor;
may I ask you a few questions;
I have a class at ten;
come in ones office hours;
finish reading ones research report;
revise some parts of it;
get it published;
read some papers he recommended;
correct all the typing errors in a paper;
read it through again;
check the paper for typing errors
