It sounds like you could do with an assistant but that's obviously not possible, so what about having an online system that students can use to do their scheduling?

听起来你需要一个助手，但这显然是不可能的，那如果有一个在线系统来帮助学生做他们的日程安排呢？

We are short of an online system.

我们缺少联线系统。

The NLS wasn’t just the online system, it was the networked system.

NLS不仅仅是一个线上系统，而且还是一个网络系统。

Although it is difficult to find a book before, it is very easily and quickly today as online system.

尽管以前得到一本书是困难的，但今天，在网络系统中就能很简单快捷的获得。