The leaders of the Kopper Company were then stunned speechless.是什么意思？

The leaders of the Kopper Company were then stunned speechless.

科伯公司的领导们当时被惊得目瞪口呆。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

leaders

n. 领袖( leader的名词复数 )，（管弦乐队的）首席小提琴手，最佳的人（或物），（在赛跑、商业等活动中）处于领先地位的人（或物）；

例句
...an opportunity for the leaders to become better acquainted.
增进领导人之间相互了解的机会

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

company

n. 公司，商号，作伴，伴侣，客人，连队，中队，（社交）集会，聚会；

例句
The company say they're able to keep pricing competitive...
该公司说他们能够使定价保持竞争力。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

then

adv. 那时，然后，那么，话说回来；adj. 当时的，那时的；

例句
Liz adjusted her mirror and then edged the car out of its parking bay.
莉兹调了调后视镜，将车子挪出了停车位。

stunned

v. 击晕( stun的过去式和过去分词 )，使大吃一惊，给（某人）以深刻印象，使深深感动；

例句
Many cinema-goers were stunned by the film's violent and tragic end.
许多来看电影的人都被这部影片暴力而悲惨的结局所震惊。

speechless

adj. 无言的，（因惊愕）一时语塞的，默然，无言以对；

例句
The Chief was left speechless by this fatuous remark.
这句傻话让主任一时说不出话来。