solitary tract

例句：

1. 1. The scientist isolated a new virus that causes the disease.
   科学家分离出一种新的病毒，导致这种疾病。
2. 2. The solitary tract is responsible for transmitting signals from the brain to the rest of the body.
   孤独的管状结构负责将大脑的信号传输到身体的其他部分。
3. 3.The solitary tract plays a crucial role in the regulation of blood pressure.
   孤独的管状结构在调节血压方面起着至关重要的作用。