agricultural extension service的用法和样例：
例句
- The Extension Service at Oregon State University, for example, has a new publication for small farms.
举例来说，俄勒冈州大学的推广服务，有一本有关小型农业的新的刊物。 - Efforts to strengthen the technical support and extension services should include an intensive train-the-trainers program.
加强技术支持和推广服务的努力应该包括一个强化培训员培训的项目。
