理所当然的，屏幕这种新出现并且无孔不入的文字载体，已经改变了人们的阅读书写习惯。
And of course, these newly ubiquitous screens have changed how we read and write.
我们阅读的文献以何材料为载体一直以来都非常重要。
Let's just say that what the things we read are made out of has always been very, very important.
用例为描述客户和开发者能理解并阅读的需求提供了载体。
Use cases give us a vehicle for specifying requirements that customers and developers can understand and review.
应用推荐