1. If you focus the sun's rays on dry wood with a burning-glass, it will start burning. 如果你用取火镜使太阳光线聚焦在干木头上，木头就会燃烧起来。
2. I should focus more. 我应该集中更多。
3. We must focus on ourselves and respect the opponent. 我们必须集中注意力，同时要尊重对手。
英英解释
n.
1. the concentration of attention or energy on something
2. maximum clarity or distinctness of an image rendered by an optical system
3. maximum clarity or distinctness of an idea
4. a central point or locus of an infection in an organism
5. special emphasis attached to something
6. a point of convergence of light (or other radiation) or a point from which it diverges
7. a fixed reference point on the concave side of a conic section v.
1. direct one's attention on something
2. cause to converge on or toward a central point
3. bring into focus or alignment; to converge or cause to converge; of ideas or emotions
4. become focussed or come into focus
5. put (an image) into focus
