Perfluoroethylene
[机] 四氟乙烯
🗣️ 情景例句
Her boyfriend couldn't provide her with a sense of security.
她的男朋友无法给予她安全感。
That's my business.
那是我的事情。
“I wish I'd known about that rule earlier, she said.
“我要是早点知道这个规矩就好了！”她说。