پاورپوینت بخش اول درس سوم زبان کلاس دهم

This gives us an easier life when there is no light.                  
We use this to take and keep pictures very easily.
People use this to talk with someone in another place.
This helps us travel very fast to far places.
Roya: When I came in, you were reading a book. What was it?
Mahsa: I was reading a book about famous Iranian scientists.
Roya: But such books are not very interesting.
Mahsa: At first I had the same idea, believe me!
Roya: Did you find it useful?
Mahsa: Oh yes. Actually I learned many interesting things
 about our scientists’ lives.
Roya: Like what?
Mahsa: For example Razi1 taught medicine to many young people
while he was working in Ray Hospital. Or Nasireddin Toosi
built Maragheh Observatory when he was studying the planets.
Roya: Cool! What was the name of the book?
Mahsa: Famous Iranian Scientists.
…