focus on
1．aim（light） directly onto把（光）在…上聚成焦点
If you focus bright sunlight on dry wood with a magnifying glass，it will start burning ．用放大镜把强阳光聚焦到干柴上，干柴就会燃烧起来。
2．direct one's thoughts firmly on 思想集中到…上
We must focus our attention the question of reducing costs．我们必须把注意力集中到降低成本这个问题上。
The audience focused its attention on the speaker．听众把注意力都集中在演讲者身上。
She focused her mind on her lessons．她把她的心思都集中在学习上。
3．have as its main point of interest重点是；中心是
This year our meeting focuses on the question of children's rights．今年，我们的会议中心议题是儿童的权益。