In the past, doing the timetabling was quite simple but now we have a lot more courses and what's made it complicated is that many of them have options.

在过去，做时间表是很简单的，但现在我们有更多的课程，让这个过程变得复杂的是，当中许多课程还有不同选择。

youdao

In the past, doing the timetabling was quite simple but now we have a lot more courses and what's made it complicated is that many of them have options.

在过去，做时间表是很简单的，但现在我们有更多的课程，让这个过程变得复杂的是，当中许多课程还有不同选择。

youdao