He wasn't irritable or snappy or anything, just slightly perplexed.他并不是爱发火或爱起急什么的，他只是有点困惑。They were perplexed by her response.她的答复令他们困惑不解。The farmer felt the cow, went away, returned, sorely perplexed, always afraid...
从狭义来说, 换热器是一种容器.A heat exchanger, in a narrow sense, is a vessel.高温断流器切断给通往热器的电源.A high - temperature cut - out isolates power supply to the heater.最终结果是从冷蓄热器吸取了热.The net result is an absorption of heat from the cold res...