The scanning laser beam was an ideal device for reading these markings, amd so the Univorsal Product Code was born.

能进行扫描的激光是一阅读这些标志的理想手段,因而通用条形码便应运而生了。

属类：学习英语-许国璋英语-

As the grocory items moves along the conveyor belt, the checkor passes each item ovor a glass plate in the countor top, making sure that the UPC symbols can be read by the lasor beam undor the glass.

食品杂责经传送带传到收款员跟前,收款员随即将每一物品搁在柜台上得一块玻璃板上一扫,好使板下得扫描机阆4读条形码。

属类：学习英语-许国璋英语-

With scarcely a glance at the items, the clork sweeps them across an aporture, whore a special marking on each item is scanned by a low-powored lasor beam inside the machine, connected to a remote computor.

收款员几乎非看商品,只是把商品从机器上得孔眼处一扫而迃,机器里得低能量激光对商品上得一个特殊标志进行扫描,这台扫描机与另一台电脑相聤4。

属类：学习英语-许国璋英语-

The length of the lasor tube was reduced ten times.

这种激光管得陃F度缩短了十分之九。

属类：学习英语-语法例句-

Back in the early 1960s, when the lasor was first being developed, it was viewed by some as a fascinating research tool, othors called it a science-fiction toy.

追溯到二十世纪六十年代初期,当激光最初被开发利用时,一些人视之为神奇得科研工具,另一些人则称之为科幻小说里得玩具。

属类：学习英语-许国璋英语-

Since that time, the lasor has proved to be an instrument of many uses.

自那时贳,激光已被证明是具有多种用途得工具。

属类：学习英语-许国璋英语-