Dipivaloylmethane
二叔戊酰甲烷, 二(三甲基乙酰基)甲烷
🗣️ 情景例句
We hired a woman to watch Richard and then Susan,
我们雇用一名女士来照顾Richard ，后来又照顾Susan
Who is the auther of this biography?
谁是这篇传记的作者？
They are walking over the bridge.
他们正在过桥。