Meanings

weather satellite

geodetic satellite

body guard

(Chinese) Red Guards

the avant-garde

Food Sanitation Act

nuclear defenses

to provide (a person) with a bodyguard

Imperial guard

sanitary conditions

measures to defend oneself (for self-defense) (defence)

avant-garde art

defense spending

hygiene

balancing toy

Galilean moons (four largest moons of Jupiter)

killer satellite

reconnaissance satellite

safety and health education

joint defense