Front

Improve or develop something

Back

Build up

Front

Practice something you learned before

Back

Brush up on

Front

Remember

Back

Sink in

Front

Review very carefyully

Back

Go over

Front

To stay at the same level of someone

Back

Keep up with

Front

Understand something easily

Back

Get by

Front

Manage with the minimum effort

Back

Pick up

Front

Keep trying even tho it's difficult

Back

Stick at

Front

Remembered when needed

Back

Come back to

Front

To be noticeably

Back

Stand out