n.反应物,试剂
Unless reagent grade sucrose is available use cane sugar.
如果没有试剂级的蔗糖,可以用甘蔗糖.
This bifunctional reagent links protein molecules to one another.
这种双用试剂把蛋白质分子彼此连接起来.
It is like a chemical reagent.
这就像是一种化学试剂.