齿条的英文：rackspline参考例句：A steering rack,eg on a cable car转向齿条(如缆车上的).The four main types of gears (spur, helical, worm, and bevel)and a rack and pinion are shown in Figure 7图7所示是四种主要的...阅读全文
研制的英文：manufacturedevelop参考例句：Many early launch vehicle s were derived from intercontinental ballistic missiles.早期的运载火箭有许多原来是为洲际弹道飞弹而研制的。A test device for flack flowing systems base...阅读全文
研究开发工程师的英文：Research and Development Engineerresearch是什么意思：n. 研究，调查，探究v. 调查，探究The first is to divide psychological research into basic research and applied research.一种是把心理学的研究划分为基础研...阅读全文
研究与开发的英文：【计】 research and development参考例句：The time-lag between research and development研究与开发之间相隔的时间.second, researching on, developing and promoting key and common technologies nee...阅读全文
