Fumaric
a. [化]反丁烯二酸的
🗣️ 情景例句
If you don't know a person's last name, use 'ma'am' or 'sir'.
如果你不知道一人的姓， 你应称呼他为 'ma'am' 或 'sir' 。
Affairs that are done by due degrees are soon ended.
事情要安步就班地做，就会很快地做完。
You've got it.
你明白了。