短文填空what is lifelong learning?

Machine learning is a type of artificial intelligence (AI) that provides computers with the
ability to learn without being explicitly programmed. Machine learning focuses on the development
of computer programs that can teach themselves to grow and change when exposed to new
data.

The process of machine learning is similar to that of data mining. Both systems
search through data to look for patterns. However, instead of extracting data for human
comprehension -- as is the case in data mining applications -- machine learning uses that data to
improve the program's own understanding. Machine learning programs detect patterns in data and
adjust program actions accordingly. For example, Facebook's News Feed changes according to
the user's personal interactions with other users. If a user frequently tags a friend in photos,
writes on his wall or "likes" his links, the News
Feed will show more of that friend's activity in the user's News Feed due to presumed
closeness.