green belt
noun
1
- an area of open land around a city, on which building is restricted（城市周围的）绿化地带。
2
- a green belt marking a level of proficiency in judo, karate, or other martial arts below that of a brown belt（柔道、空手道等武术中表示技术级别的）绿腰带（低于褐腰带级）。
2.1
- a person qualified to wear this绿腰带级运动员。