单词：foci
音标：['fәusai] ；
pl. 焦点, 焦距, 对焦点, 聚焦, 活动中心, 集中点, 兴趣中心, 病灶, 震源, 疫源地
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 special emphasis attached to something
n a point of convergence of light (or other radiation) or a point from which it diverges
n a fixed reference point on the concave side of a conic section
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 special emphasis attached to something
n a point of convergence of light (or other radiation) or a point from which it diverges
n a fixed reference point on the concave side of a conic section
foci的用法和样例：
例句
用作名词(n.)
- We put the cage in one of the field's foci.我们把笼子放在区域中的一个焦点处。
- The earth revolves around the sun in an ellipse with the sun at one of the foci.地球在以太阳为焦点的椭圆上围绕太阳公转。
词汇搭配
- focus焦点
- natural foci自然疫源地
- mirror foci镜焦点
- hemorrhagic foci[医] 出血灶
- secondary foci[医] 继发性病灶...
- conjugate foci共轭焦点