Beginner Level Intermediate Level Advanced Level
Composite Words Listening Comprehension Oxford Topics Duolingo Topics
315 Activities E
exact: like: hệ số
VNEN 
hệ số * ☊ 
coefficient, weight (of subject in exam) * ☊
315A Tôi thư giãn trên ghế sofa I relax on the sofa 10. At Night