| 1. | Only healthy birds can be vaccinated 只有健康的家禽才能接受疫苗接种。 |
| 2. | Only healthy birds can be vaccinated 只有健康的鸟类才能注射疫苗。 |
| 3. | Only healthy birds can be vaccinated 只有健康的鸟才会被注射疫苗。 |
| 4. | Only healthy birds can be vaccinated 只有健康的家禽才能注射疫苗。 |
| 5. | Apparently healthy birds can be carriers and shed the infectious agent , particularly when subjected to stress through crowding and shipping 看似健康的雀鸟亦可能带菌,它们在挤迫环境或船运等过程中受压时,最易将病菌传播。 |
| 6. | Apparently healthy birds can be carriers and shed the infectious agent , particularly when subjected to stress through crowding and shipping 看似健康的雀鸟亦可能带菌,它们在挤迫环境或船运等过程中受压时,最易将病菌传播。 |
| 7. | Culls could make the situation worse by dispersing infected individuals and stressing healthy birds , making them more prone to disease 销毁野鸟将使情况更形恶劣,因为受感染的个别雀鸟会四处逃窜,对健康的鸟群构成压力,使它们更易感染病毒。 |
| 8. | Only healthy birds can be vaccinated . people who work with farm birds are advised to keep clothing and shoes free of material and waste that could spread infection 只有健康的禽类才可以注射疫苗。建议在农场饲养禽类的人员衣物和鞋子远离可以传播感染的材料和垃圾。 |