potato virus X

例句：

1. 1. The potato virus X is a commondisease in potatoes.
   马铃薯X病毒是土豆中的常见疾病。
2. 2. Potatoes are susceptible tothe potato virus X.
   土豆容易受到马铃薯X病毒的感染。
3. 3. Researchers have been workingon developing a vaccine against the potato virusX.
   研究人员一直在努力开发对抗马铃薯X病毒的疫苗。