eР第三段课文和词组Рspencer designed a metal box with a hole into which he fed microwave power .the energy enering the box was unable to escape,thus creating an ic field when food was placed in the box and microwave energy fed in,the temperature of the food rose very rapidly.Dr.spencer had invented the microwave oven?metal 金属;合金? ['met(ə)l][ 过去式 metalled或-aled 过去分词 metalled或-aled 现在分词 metalling或-aling ]?hole 洞[həʊl] [ 过去式 holed 过去分词 holed 现在分词 holing ]?ic adj. 电磁的?rapidly adv. 迅速地;很快地;立即['ræpɪdlɪ]Р第四段语法Рmake use of 使用,利用?in use 在使用中?use in 用于;…的效用?use for 某物有什么作用;用于…Рengineers went to work on spencer's hot new idea,developing and refining it for practica use?工程师们开始忙于斯宾塞的这个新主意,对之进行开发和完善,使之能够具有实际用途Р本句中developing and refining it for practical use是伴随状语,其中的its指代spencer’s hot new idea.РThe end,thank you!
全文预览
