A preliminary groundwork must be laid this year.今年要打好初步基础。Objective To study the preliminary effects of modified black diaphragm intraocular lens implantation on aphakia aniridia.目的探讨带虹膜隔人工晶状体在外伤性无虹膜无晶状体眼中的应用价值.A backgro...
Anyone who breaks the law does so at their peril.违法者要自担后果。The British never awaken to peril until it is almost too late.英国人从来不懂得防患于未然。In spite of great peril, I have survived.虽然处境非常危险，我还是挺过来了。...