Pentabromide
五溴化物
🗣️ 情景例句
When he came to the States five years ago, he had only forty dollars in his pocket.
五年前他来美国时，口袋里只有40美元。
How much do you charge per unit?
你们每件要价多少呢？
They can't pick up the small pieces with their fingers.
他们用手指拿不起小零件。