1.This allows users to focus on a part of the image, and blur out the rest.
focus on 專注于;集中于
We should focus on day-to-day work.
我們要把主要精力放到經常工作方面
Our policy is to focus on developing these areas.
我們的政策是著眼于把這些地區發展起來
2.People take hundreds or even thousands of photographs with their smart phones.
thousands of 數以千計的;無數的
A computer consists of thousands of components.
電腦由成千上萬個部件組成
The game drew thousands of spectators.
這場比賽吸引了數千名觀眾