Senior diplomats from India and Pakistan are to resume formal negotiations in Delhi on February 25th for the first time since that attack.

来自印度和巴基斯坦的高级外交官2月25号在新德里恢复正式谈判，这是袭击发生以来的第一次。

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While critics of the CA system have long feared that such an attack could be possible, this is the first time such an attack has been seen "in the wild".

尽管电子认证系统的批评者们已经长时间担心攻击的可能性，这还是第一次“在自然环境中”发生这种攻击。

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This is the first time that scientists have done a systematic analysis of how genes can influence the effect of coffee on heart attack risk.

报道说，这是科学家们首次对基因如何影响咖啡对心脏病发作危险的作用进行系统的分析研究。

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So how would we go about solving this problem if I told you not only was there a maximum weight, but there was a maximum volume. Well, we want to go back and attack it exactly the way we attacked it the first time, which was write some mathematical formulas.

有些时候两个都重要,所以如果我告诉你这里不仅有,最大重量还有最大容量，我们应该怎么解决这个问题呢？,好了，我们想回过来然后,和第一次一样看看这个问题。

麻省理工公开课 - 计算机科学及编程导论课程节选

It is thought to be the first time such an insider attack was carried out by a woman.

BBC: Policewoman who killed US aide in Kabul 'is Iranian'

Others take the time transform first, adding to their attack flexibility while increasing their vulnerability.

FORBES: Connect

Over the weekend, Syrian TV broadcast video of Wednesday's attack site for the first time, showing destroyed vehicles and a damaged building identified as a scientific research center.

NPR: Iranian Official: Israel Will Regret Syria Strike