英语词汇“第一级”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	第一级
释义	第一级 Dì Yī Jí 基本例句 first stepprimaryfirst-order繁体第一級那是第一级的邮件，收到时却处于第二级状态。It arrived by first-class mail in second-class condition. 第一级运载火箭是用来发射火箭的，进入高层大气後即抛掉。The first-stage vehicle is used to launch the rocket and is then jettisoned in the upper atmosphere.
随便看	main power equipment main powerhouse main power house main power jet main power motor main power path main powerplant main power plant main power source main power station main power supply main power supply system main power switch main power system main power transformer Main power voltage main practice main pram main primary system main principal force main principal part of a project main principle main principles Main prineiples mainprise