n.反应物,试剂;
例句:
It compares the nucleophilicity of nocleophilic reagent with the similarities and differences of basicity.
把亲核剂的亲核性和碱性的区别与相同之处进行了比较.
Don't clean it with chemic reagent , such as solvent and thinner.
不要用化学试剂清洗, 否则回引起溶解或稀释.
All reagent bottles must be stoppered immediately after use.
所有的药瓶用过后必须及时用瓶塞盖住.