Maleoyl
馬來酰基，順丁烯二酰基
??? 情景例句
He looked up at me.
他仰頭看我。
We have new methods like compensation trade and joint ventrue.
我們有補償貿易和合資經營。
In her letter, she said that she would come to England next year.
在信中她說她明年將到英國來。