not up to much meaning in English

没多大价值

His work is not up to much .
他的作品不会有很大价值。
That new television series is not up to much
那部新的电视系列片的效果并不十分理想。
He talks well , but his write is not up to much
他谈吐很好，但文笔不行。
Fiona : oh , you knew her , too . can i get you something ? a cup of tea ? i ' m afraid the coffee ' s not up to much here
哦，你也认识她。要喝点什么么？一杯茶？这儿咖啡可不怎么样。
Are you an accountant ? also not up to much , what if work , do is good , still have development outlook , or it is follow the general trend oh
你是会计吗？也不怎么样，假如工作做的好的，还有发展前途，要不然就是随大流了哦！