Self-study 2b

superb:adj. excellent; of very good quality;

redundancy:n. 1、the situation when sb has to leave their job because there is no more work available for them;2、the state of not being necessary or useful;

Expansion: n. an act of increasing or making sth increase in size, amount or importance;

Streamline: v. 1、to give sth a smooth even shape so that it can move quickly and easily through air or water; 2、to make a system, an organization, etc. work better, especially in a way that saves money;