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....
You simply can't get a ticket through official channels.通过官方渠道是压根儿搞不到票的.They have four satellite channels.他们有4个卫星频道。The company provides more than 20 free-to-air channels.本公司提供20多个免费收视频道。...