368. They also carry out research work aimed at extending man's knowledge of these subjects.

英语四级译文:
他们也会开展旨在扩充人类对这些学科的知识的研究工作。

四级词汇讲解:

carry out意为“实行，进行”。如:
You should carry out that plan as soon as possible.你应该尽快实施那项计划。
They carried out the commander's instructions to the letter.他们不折不扣地执行了指挥官的指示。

aimed at意为“目的是，旨在”。如:
The measures were aimed at preventing crimes.这些措施旨在预防犯罪。

extend此处意为“扩充，扩大范围”。如:
The company plans to extend its operations into Africa。公司计划将业务扩展到非洲。

英语四级考点归纳:
有关carry的动词短语常见的还有:

※ carry on意为“继续做，坚持”。如:
Carry on, everyone! 大家坚持住!
They carried on dancing as if nothing was happening.他们继续跳舞，就好像什么事都没发生一样。

※ carry over意为“继续存在，留后使用”。如:
Vacation time can be carried over into next month.假期可以延至下个月。

※ carry through意为“实现，完成;使渡过难关”。如:
He's determined to carry that through.他决意完成那件事。
Your support carried me through.是你的支持让我渡过了难关。