retion learning 附学习
total mixed retion 全混合日粮
retion vein ocelusion 视网膜静脉阻塞
extraterrestrial retion grant 恢复奖
The result of HPLC showed that the retion time of the production of strain ZY-23 is similar with standard substance.
HPLC检测结果显示，ZY-23菌株的发酵产物中提取得到的毒性成份保留时间与标准品基本一致。
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