Tetraethide
四乙基金属
🗣️ 情景例句
He has a white-collar job.
他做的是白领工作。
All things are easy that are done willingly.
做事乐意，诸事容易。
She watched TV for half an hour after supper. Then she started her homework.
晚饭后她看了半小时电视。然后她开始做家庭作业。