The little hedgehog to red jujube, rats, insect pests… And small ants to find other insects to eat, they are all busy.

小刺猬去找红枣、田鼠、害虫……，而小蚂蚁去找其它的昆虫吃，它们都忙碌着。

youdao

Also one of the most useful resources you'll find is the course's website; where not only will the obvious be posted like handouts and such, pests in the syllabus, but there will also be a variety of tools that you can turn to over the course of the semester including our own videos.

而且你将发现最有用的资源之一就是课程网站,这里不仅有讲义,教学大纲的错误之处，还有大量课程中使用的工具,包括我们自己的视频等,这对这学习很有帮助。

哈佛公开课 - 计算机科学课程节选

But she says the lower yields of organic farms in any country could be greatly increased as scientists learn more about controlling insects and disease without chemicals, and find the right crops to suit a particular region's pests and climate.

BBC: Organic farming can 'feed the world'