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。
Washington Post reported Sunday, according to Western diplomats and nuclear experts briefed on the information, Iran, with the help from foreign scientists, has finished crucial steps and overcome techinical challenges.

5. 曾在国际原子能机构工作的一名前任官员说，伊朗取得的进展包括设计、测试引发核爆炸的爆炸装置。
A former official of the international nuclear institute said, Iran made progresses in the design and testing of nuclear explosion ignition device.