光学变焦的英文：
optical zoom
adj. 眼睛的，视觉的；光学的
Optical brightener(Optical brightness agent): Synonymous with Optical bleaching agent.
光学增光剂:即光学漂白剂。
Optical depth and optical path are often confused in the literature.
文献中光学厚度和光程时常混淆。
A computer that is made of optical fiber and various optical elements
一种利用传递光信号的光纤与各种光学元件相结合而制成的计算机。
optical sighting device
光学照准器
A kaleidoscope is an optical toy.
万花筒是一种光学玩具。
v. （嗡嗡作响地）快速移动；急剧增长；（使）摄象机移动
n. 隆隆声；疾驰的声音；变焦
To cause to zoom.
使急遽上升，使猛增
Traffic zoomed past us.
车辆从我们身边疾驰而过。
To move swiftly;zoom.
快速移动迅速地移动；急遽上升
The economy shrank and inflation zoomed.
经济萎缩，通货膨胀加剧。
I heard the zoom of an aircraft.
我听见飞机的发动机声。