2句中译英..使游客们失望的是太湖已不再是从前的样子了.（what)我只是粗略地知道一些优质纸是如何用竹子制造出来的（a rough idea)

Those who cause the tourists to be disappointed was Tai Lake no longer is past appearance. (what) I only am knew sketchily how some high quality papers are do use the bamboo to make (a rough idea)

So that tourists disappointed that the lake is no longer what it used be.
I just have a rough idea roughly how to use a number of high-quality paper is manufactured out of bamboo.

1、To tourists' disappointment that the lake is no longer like what it was .2、I just have a rough idea how a number of high-quality paper is manufactured out of bamboo.