Pentabromination
五溴化反应
🗣️ 情景例句
I applied for a job as a lifeguard at the community pool.
我申请了社区游泳池的救生员工作。
Do you happen to know Mr. Cooper's telephone number?
你知道库珀先生的电话号码吗？
It's the hottest day I've had so far.
这是迄今为止我经历的最热的一天。