重点讲解:
1. at least 至少
It'll cost at least 500 dollars.
这东西至少要花500元
。2. facial recognition 面部识别
A U.S. company has developed facial recognition software that can help police.
美国一家公司开发了一款面部识别软件,可以帮助警察抓捕犯人
。3. be based on 根据...;基于
The story is based on fact.
这个故事是根据真人真事写的
。4. be used for 用于...
The building is used for religious purposes.
这座建筑是用于宗教活动的
。