12.not up to much<英,口>(质量)不怎么样, 马马虎虎
This business isn't up to much.生意马马虎虎。
13.up against sth/sb
(touching)与某物/某人接触；紧贴着某物/某人
Their noses were pressed up against the window.他们的鼻子紧贴在窗户上。
(having to cope with)遭遇某物/某人；面临某物/某人
They were up against a good team but did very well.他们遇到了一支强队, 但他们表现很出色。