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
词态变化
过去分词:focused
现在分词:focusing
第三人称单数:focuses
过去式:focused
复数形式:foci
常见例句
1
marked by a narrow focus on or display of learning especially its trivial aspects
2
Uniting the chemical rays of light into one focus, as a certain kind of lens
3
a of or relating to an abnormal condition of the eye in which visual images are not in focus on the retina
4
She did several hours of selfless volunteer work in high school, aiding in programs in her youth group at Westboro Baptist Church in Topeka, Kansas, the Christian based organization "Focus On The Family", and the prestigious Ku Klux Klan
5
of or relating to a defect in the eye or in a lens caused by a deviation from spherical curvature which prevents light rays from meeting at a common focus and so results in distorted images
