n. the concentration of attention or energy on something
n. maximum clarity or distinctness of an image rendered by an optical system
n. maximum clarity or distinctness of an idea
n. a central point or locus of an infection in an organism
n. 焦点, 焦距
vi. 聚焦, 注视
vt. 使聚焦, 调焦, 集中
[计] 焦点
1. I need to focus on my studies this week.
我这周需要专注于学习。
2. Please focus your attention on the speaker.
请把注意力集中在演讲者身上。
3. It’s hard to focus when there are so many distractions.
有这么多干扰时，很难集中注意力。