Pentabromination
五溴化反應
??? 情景例句
Don't treat me as an idiot.
別把我當傻瓜。
What can I do for you?
我能為您做些什么？
He believed that everyone should be prepared to do heavy work, from the leaders to the poorest peasants.
他認為從領袖到最窮苦的農民，每個人都該樂于從事重體力勞動。