翻译下列句子。
1.这个戒指是银制的。
The ring is made of silver.
2.这种纸是由树木制成的。
This kind of paper is made from wood.
3.油漆是由什么制成的?
What is paint made from?
4.杭州因其茶叶而为人所知。
Hangzhou is famous for its tea.
5.据我所知，茶树被种植于山坡上。
As far as I know, tea plants are grown on the sides of mountains.