A pocket of something is a small area where something is happening, or a small area which has a particular quality.
(与周围区域不同或孤立的) 小块地区
If someone who is in possession of something valuable such as a sum of money pockets it, they steal it or take it for themselves.
将…据为己有(pick one's pocket)
You use pocket to describe something that is small enough to fit into a pocket, often something that is a smaller version of a larger item.
袖珍的