In last session, we contacted some situations that need to use addition. We now have a clearer conception that addition is not applied for only write down more words. Addition is not equal to blather. Since we have talked about addition for meaning and rhetorical need, in this session we will mainly analyze it for syntactic need. What do you think will be the syntactic need of addition? Today we will continue to learn the left part of addition to have a deeper understanding of it.