| 1. | Acoustics - pure tone air conduction threshold audiometry - for hearing conservation purposes
声学纯音气导听阈测定听力保护用 |
| 2. | Specification for pure tone air conduction threshold audiometry for hearing conservation purposes
听力保护用纯音色空气传导阈值听力测定规范 |
| 3. | Acoustics . pure tone air conduction threshold audiometry for hearing conservation purposes
声学.为保护听力而进行的纯音空气传导阀值听力测定法 |
| 4. | New floating mudflat bird - watching hide at mai po nature reserve for education and conservation purposes
米埔自然保护区兴建新观鸟屋作教育与保育用途 |
| 5. | Acoustics ; pure tone air conduction threshold audiometry for hearing conservation purposes identical with iso 6189 : 1983 ; german version en 26189 : 1991
声学.用于保护听觉的纯音调空气传导阈值的听力测定法 |
| 6. | Many of these islands have been recommended for landscape protection and conservation purposes in view of their ecological and scenic values
由于这些岛屿大多具有生态及景观价值，宜作景观保护和自然保育。 |
| 7. | This type of land has legal restrictions that prevent it from being developed or being used for anything other than recreation or conservation purposes
这种土地只能用来旅游开发或做自然保护区，不能随便开发。 |
| 8. | He also welcomed the expansion of country parks on lantau , and the improved management of the country parks for recreation and conservation purposes
他又欢迎扩展大屿山的郊野公园范围，以及就康乐及保育用途加强郊野公园管理。 |
| 9. | He also welcomed the expansion of country parks on lantau , and the improved management of the country parks for recreation and conservation purposes
他又欢迎扩展大屿山的郊野公园范围，以及就康乐及保育用途加强郊野公园管理。 |
