雙語笑話：無知者無罪

Ignorance is No Disgrace

The little brother of an Army radar operator asked，“Jim，tell me how does a radar work？”

“The radar transmitter emits brief impulses of electromagnetic waves which are reflected from the target and received by a special receiver．Since the speed at which electromagnetic waves propagate is exactly known and the time they take to travel to the target and back can be determined with a great degree of accuracy，it is possible to determine the range to the target as well as the direction to it．”

His brother pondered a moment，then said，“As long as you don’t know，Jim，why don’t you just say so？”

無知者無罪

一個(gè)雷達(dá)兵的小弟弟問他：“吉姆，能告訴我雷達(dá)的工作原理嗎？”

“雷達(dá)發(fā)射器發(fā)射出短促的電磁波脈沖，被目標(biāo)反射，由一個(gè)特殊的接收器接受。因?yàn)殡姶挪ǖ膫鞑ニ俣瓤梢詼?zhǔn)確地知道，而且它們傳播到目標(biāo)的時(shí)間以及返回的時(shí)間都可以在很大程度上準(zhǔn)確地知道，因此，可以探測出目標(biāo)的距離以及目標(biāo)的方向?！?

他的小弟弟思考了一會兒，說道：“既然你不知道，吉姆，為什么你不直說呢？”