Gb	Eng
我们的教授要求他就这个课题写篇论文。	Our professor asked him to write a treatise on the subject.
他从事于物理研究／这一课题许多年了。	He has worked at physics/the topic for many years.
主题，范围一个题目、课题或学术兴趣或专业领域	A topic, a subject, or an area of academic interest or specialization.