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 really won't tell?" she asked, begging for reassurance.“你真的不说吗？”她问道，乞求得到安慰。Immediately, Daniel cut in on Joanne's attempts at reassurance.乔安妮刚要作保证，丹尼尔就把她打断了。She needed reassurance that she belonged somewhe...
“我们请她来吃晚饭吧。”——“除非我死了！”"Let's invite her to dinner." — "Over my dead body!"除非是直接被击中，否则这个地下掩体是非常安全的。The dug-outs were secure from everything but a direct hit.除非其他部门同样努力，否则这些目标无法达成。The targets would not be achieved unl...
Alexander's engineers built floating rafts for the heavy catapults.亚历山大的工兵修建了浮动的筏子来运载沉重的弩炮.Alexander signified his consent with a nod.亚历山大点头表示同意.Alexander Graham Bell invented the telephone in 1876.一八七六年阿历山大·格雷厄姆·贝尔...