But this isn't a long paper, so are you going to need to pick a specificarea of pre-modern agriculture, like irrigation or food crops of ancient Greece.
但这不是一篇很长的论文，所以你要选定一个现代以前农业的特定领域，像是灌溉技术，或古希腊的粮食作物。
2
They can be directed onto a specificarea.
它们可以指向一个特定的区域。
3
Each functional schema pertains to a specificarea of functionality.