1. 义务兵役：reconnaissance-偵察 | ring-徒党 | Selective Service-義務兵役
2. [美]义务兵役制：see service 服役; 参加战斗; 有实战经验 | Selective Service [美]义务兵役制 | stand by service 备用
3. 选择服务：选择排序算法 Selection sort algorithm | 选择服务 Selective Service | 自引用 Self-reference
4. 兵役署：Selective retrieval of information;有选择地检索资料;; | Selective Service;兵役署;; | selective tariff;选择性关税率;;