not too clear

• 不大清楚

not too clear的用法和样例：

例句

1. Actually, I'm not quite sure what's contraband.
   实际上我不大清楚什么是违禁物品。
2. He gave a sort of cough and gulp, and at first I could not hear quite clearly.
   他发出一种咳嗽和吞咽的声音，所以我最初听不大清楚。