回复：*=*=* 《每日一句汉译英》*=*=*科技篇。

4. 《华盛顿邮报》星期日晚上报导说，据了解这份情报的西方外交官和核专家透露，伊朗已在外国科学家的帮助下完成关键步骤，克服了技术难题。

According to the disclosure by the Western diplomat and nuclear expert, Iran has tackled the perplexing technical in critical steps in nuclear weapon design with the help from foreign scientist, reported by Washington Mail on Sunday Evening.