Preproinsulin
n. [生化]前胰島素原
??? 情景例句
What's the tuition for one year of college?
大學(xué)一年的學(xué)費是多少？
If you want the trunk, look in the attic.
如果你要箱子，就在閣樓上。
There are four of us.
我們有4人。