mandatory基本解释
adj,强制的；托管的；命令的,同近
Murder carries a mandatory life sentence ..谋杀罪依照法律要判无期徒刑。
强制的；托管的；命令的英释中释adjif something is mandatory, the law says it must be done
mandatory standard,n. 强制性标准，法定标准；推荐性标准.短语
