英语词汇gradation of age classes是什么意思，gradation of age classes的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典

单词	gradation of age classes
释义	gradation of age classes　龄级顺序
随便看	out at the heel out at the heels out back out clearer out code out cold out cold out cold out diffusion out drawing out east out focus out for out for out for sb.'s blood out for scalps out for the count out for the count out for the count out from under out from under out front out front out front out gas

英汉汉英翻译词典包含1679246条英汉翻译词条，基本涵盖了全部常用英语单词及常用语的翻译及用法，是英语学习及翻译工作的有利工具。