1. ´Brush up(on)´ significa ´aprimorar/revisar ´

Meaning: To improve your knowledge of something already learned but partly forgotten – by practicing and revising it

Ex:

1.I need to brush up my Spanish before the exam.

2.You had better brush up on your driving if you want to drive on the motorway.

2.´Be a far cry from something´ significa ´muito diferente´
Meaning: To be completely different from something

Ex.

1.This new house is a far cry from the flat where we lived before.
2.The public schools are a far cry from the private schools in the city.

3. ´To my mind´ significa ´na minha opinião ́

Meaning : In my opinion

Ex. 1. To my mind, being honest is the best thing to do.
2. To my mind, moving to a new country is a very difficult decision.