1. pick up
Today we are going to learn “pick up”. If you pick up something such as a skill or an idea, you acquire it without effort over a period of time.
(1). Where did you pick up your English?
(2). She is clever enough to pick up a foreign language in a short time.
2. work on something
Another phrase is “work on something”. It means to devote oneself to something, work hard on.
(1). I have to work on this article more before I’ll be happy with it.
(2). The scientists are still working on inventing new methods of reaching outer space.