Fleer
vi. 狞笑, 讥笑, 嘲弄\\nvt. 嘲笑\\nn. 嘲笑挖苦的话
🗣️ 情景例句
I don't know.
我不知道。
When did you arrive?
你什么时候到达?
One is the general atmosphere of secrecy in which it is carried out,
一是科研工作中普遍存在的保密气氛；