安全: safe; secure; safety; securi ...目标: target; objective等级: grade; rank目标等级: goal gradient目标等级假说: goal gradient hypothesis内河航标等级: classification of inland aids to navigation实现(目标等);获得(利润): realize目标等效反射面: radar cross-section; target equivalent reflective area安全等级: safe class; safety class核反应堆保护系统用于非安全目的准则: nuclear reactor use of the protection system for nonsafety purposee安全防护等级: class of safety protection安全要求等级: safety requirement classes安全整合等级: sil safety integrity level国际安全等级制度: international safety rating system建筑结构安全等级: safety classes of building structures; safetybolt浮标等物: makefast指标等高线: index contour安全保护等级划分准则: classified criteria for security protection of computer information system动物生物安全等级二: animal biosafety level 2卡拉顿最高安全等级地牢: caladon's highest security dungeon等级: 1.(按质量、程度、地位等的差异而作出的区别) grade; rank 薪金等级 pay grade; 牛奶是分等级出售的。 milk is sold in grades.2.(在社会地位和法律地位上不平等的社会集团) order and degree; social estate; social stratum 封建社会等级森严。 feudal society was rigidly stratified安全的多目标邮件扩展: s/mime数据库设计的目标:安全性 效率: database: security efficiency目标: 1.(对象) target; objective 发现目标 detect the objective; 击中目标 hit the target; 军事目标 military objective; 正中目标 be dead on the target; 他是嘲笑的目标。 he is a target for scorn.2.(目的) goal; aim; destination 达到目标 achieve one's aim; 怀着崇高的目标 with a lofty end in mind; 为一个共同目标而奋斗 fight for one common goal; 追求自己的目标 pursue one's own end; 他们有相似的目标。 they had the similar aims 消防部门职业安全和健康项目标准: standard on fire department occupational safety and health program