Noun:

1. a crude stone artifact (as a chipped flint); possibly the earliest tools

EOCn.合同的终止(转换端；反转端)EOabbr.工程指示(=Executive Order)abbr.椭圆的轨迹(=Elliptical Orbit)abbr.终端站(=End Office)abbr."异-或"逻辑(=Exclusive OR)eological management生态型管理eourseware's qualityn.电子光学跟踪系统eolorectal neoplasms结直肠肿瘤eolorectal carcinoma大肠癌eompression fracture压缩骨折eomposite foundation复合地基Eotmethis recipennisn.短翅突颜蝗eoloreetal neoplasms结直肠肿瘤eommutation formulae交换公式Eopsaltria australisn.东黄鸲鹟(鸲鹟科)