C2
[计] 操作系统安全性级别c2
🗣️ 情景例句
When you have a business meeting in the United States, come to the appointment on time.
当你在美国有商务会晤时，一定要按时赴约。
Pain is forgotten where gain follows.
好了伤疤忘了痛。
What are you doing?
你在干什么？