how to let products how brief description instead of show all description

how to let products how brief description instead of show all description under category.

I am new to wp e-commerce.So meet this very new problem.Hope somebody can help me.Thank you.

Here is the page.The products show all descrption.That is very ugly,I just need it show a brief.Such as 100 words or something less:
https://www.findmewife.com/products-page/3d-inner-laser-engraving/

https://www.ads-software.com/plugins/wp-e-commerce/