而用激光则能够激发反应物的某些特定的运动模式.Lasers can excite specific modes of the reactants.在化学过程中,氧气经常充当为反应物.Oxygen is often used as reactant in chemical processes.所加的反应物可以是二烯烃 、 环二烯烃.The feed reactants can be alkadienes, cycloalkadienes....

“反应物”的英语可以翻译为：eactant，reagent，substrate ...