| 1. | Compost is not necessarily pathogen-free .
堆肥并不一定需要无病原微生物。 |
| 2. | Other agents can cause similar syndromes .
其它病原也可引起相似的综合症。 |
| 3. | They have been able to trace the source in fewer than 40 per cent of reported cases .
已报道的病例中，找到病原的不到40%。 |
| 4. | In such situations specific laboratory tests are necessary to establish the etiology .
在此情况下，需要特异性实验来确定病原。 |
| 5. | Confirmation is accomplished by demonstration of specific antibodies or by isolation studies .
特异性抗体的证明或病原分离可以用来确诊。 |
| 6. | Nonexposure of susceptible plant populations to their pathogens is fairly common .
感病的植物群体不暴露在它们的病原之下，这是相当普遍的。 |
| 7. | Without competition from other organisms, the pathogen may grow very rapidly with serious damage .
没有其他生物的竞争病原生长迅速，危害严重。 |
| 8. | By use of the agglutination test healthy carriers of the organisms have been identified .
通过凝集实验的应用，已经证实了病原微生物的健康带菌者。 |
| 9. | The occurrence of a disease in a particular locality may indicate the etiology and nature of the disease .
某一疾病在某一特定地区的发生可能暗示该病的病原学和性质。 |
| 10. | at temperatures of 71℃, almost all pathogenic bacteria, fungi, and most plant viruses are destroyed.
71的温度几乎对所有的病原包括细菌、真菌和大多数植物的病毒都能被杀死。 |
