| 释义 |
las.erH5leI7zE5, $-zLn [C](a device which produces) a powerful beam of light that is a single pure colour and consists of light waves moving in exactly the same way as each other激光; 激光器Lasers are used for cutting hard substances such as metal and for performing delicate surgical operations.激光用来切割金属之类的坚硬物质，做难度高的精细手术。Lasers are also used to read information from compact discs and bar codes.激光还被用来从光盘和条形码上读取信息。Laser treatment involves the surgeon destroying the cancerous cells with a laser beam instead of cutting them out with a knife.激光治疗是外科医生用激光摧毁癌细胞，而不是用刀割除。There were heavy civilian casualties when a laser -guided bomb missed its target.一枚激光制导的炸弹击错目标，平民伤亡严重。A laser disc is a disc which stores information in a form that can be obtained using a laser.光盘Some movies are now available on laser disc as well as on video cassette.有些电影除了有录像带，还有光盘。A laser printer is a computer printer which works by shining a laser beam at a tube covered with carbon powder. Powder that is hit by the laser loses its electrical charge and falls off the tube and the powder that is left forms the image to be printed.激光打印机The quality and speed of laser printing are much greater than dot-matrix and bubble-jet systems.激光打印机的打印质量和速度比点阵和喷墨高。
|