单词	grade retention
释义	grade retention 留级
随便看	internal tube internal tube capacity internal tunic of eyeball internal turning internal turning tool internal twisted tape internal type internal-type idle limiter internal unit internal upset internal upset casing internal upset drill pipe internal upset forging internal upsetting internal upset tubing internal urethral orifice internal urethrotomy internal use internal user internal users internal uterine orifice (or internal orifice of uterus) internal vacuum internal validity internal valuation internal value 补牢顾犬补苴罅漏补过拾遗补过饰非补阙拾遗补阙挂漏补阙灯檠衦衧表 33231 33232 33233 33234 33235 33236 33237 33238 33239 33240