currently researching
actively researching
researching methods
researching the cause
A: What are you doing in the library?
A：你在图书馆做什么？
B: I am researching my thesis topic.
B：我正在研究我的论文课题。
1) 正在研究
2) 正在调查
3) 正在探究
1. 正在研究，调查
verb
1. To study a subject in detail, especially in order to discover new information.