这个老师让我写dictation,然后又说only main part···

这个老师让我写dictation,然后又说only main part···
1.\x05I have picked three passages for you to do the dictation exercises.Please complete at least any two of them along with the one we have listened to in today’s class.Of course,you are always more than welcome to get the additional one done!
2.\x05You only need to write down the main part of each passage,which means you don’t have to listen to and put down the source of the passage,which is generally located at the end.
听写不是全部写吗?然后only写main part是什么东西,这俩是分开的吗.
这是作业···6月初要交,我今天才写 T皿T