镨PR 镨PR的英文 英语翻译 praseodymium 拓展翻译 镨praseodymiumPr.; praseodymium氢化镨praseodymium hydride钋POpolonium钷PMpromethium破乳剂SPdeemulsifier SP镤PAprotactinium铅PBlead前MRNApremessenger RNA前R基团pro-R group茜素黄RAlizarine Yellow Ralizarin yellow R