美国国家情报总监在BBC看到的一份备忘录中警告称，伊朗已经“大幅增加了针对中东及其他地区美方人员的努力”。
Iran has "substantially increased efforts to target US personnel" in the Middle East and other areas, the US national intelligence director has warned in a memo seen by the BBC.
在杰伊·克莱顿作出这一评估之际，美国国务院正在调整该地区外交机构的人员配置，其中包括本周早些时候下令美国驻沙特大使馆的非紧急人员撤离。
Jay Clayton's assessment come as the US State Department makes adjustments to staffing at diplomatic posts in the region, including the ordered departure earlier this week of non-emergency US embassy staff from Saudi Arabia.
此前，也门得到伊朗支持的胡塞武装在过去一个月里对沙特发动的袭击不断升级，该命令正是对这一局势的回应。
The order came in response to escalating attacks by Yemen's Iran-backed Houthis against Saudi Arabia in the past month.
克莱顿的备忘录被标记为非机密，并于周五发送给美国国务卿马可·鲁比奥。
Clayton's memo was marked unclassified and sent to US Secretary of State Marco Rubio on Friday.
其中写道：“伊朗针对美国公民的致命谋划活动已在中东和某些其他国家进入高级阶段。”克莱顿表示，他正在竭尽全力对尽可能多的情报进行解密，以便鲁比奥能将其与美国国务院人员分享。
It said: "The lethal plotting efforts by the Iranians against US citizens have reached advanced stages in both the Middle East and certain other countries." Clayton said he was making every effort to downgrade as much intelligence as possible so Rubio could share it with US State Department personnel.
一名美国官员告诉BBC：“在使馆人员配置方面，我们不断评估有关安全环境的新信息。”
A US official told the BBC: "When it comes to our staffing at embassies, we constantly evaluate new information about the security environment.
“胡塞武装袭击的威胁以及针对美国官员的伊朗恐怖谋划，正在为我们对该地区处于[受限运营]状态的大使馆的人员配置调整提供决策参考。”
"The threat of Houthi attacks and of Iranian terror plots targeting US officials are informing our decisions on staffing adjustments for embassies on [Restricted Operations] Status in the region." At least 21 people have now been killed in Houthi attacks on Saudi airports since the start of October, according to Saudi authorities.
据沙特当局称，自10月初以来，胡塞武装对沙特机场的袭击已造成至少21人死亡。
One missile strike on Riyadh's international airport on 10 October killed 13 people and injured 308 others – the deadliest attack in Saudi Arabia in more than a decade.
10月10日，利雅得国际机场遭到的一次导弹袭击造成13人死亡、308人受伤，这是沙特阿拉伯十多年来发生的最致命袭击。
The Houthis say the attacks on Saudi Arabia are in retaliation to what they call a Saudi blockade of ports and airports in their territory, as well as an air strike on Sanaa airport they blame on the kingdom.
胡塞武装表示，对沙特的袭击是对他们所称的沙特对其领土港口和机场封锁的报复，同时也是对他们归咎于该王国的萨那机场空袭的报复。
Yemen has been devastated by a civil war that began in 2014, when the Houthis ousted the government from Sanaa. The conflict escalated in 2015, after the Saudi-led coalition intervened in an attempt to restore the government's rule.
也门自2014年胡塞武装将政府驱逐出萨那以来，一直饱受内战摧残。2015年沙特领导的联军为试图恢复政府统治而进行干预后，冲突进一步升级。
A four-year-old informal ceasefire began to unravel in July, when the Houthis announced a "maritime embargo" against Saudi Arabia and began missile and drone attacks. Some 155 civilians have been killed in Yemen since, according to the Houthi-run health ministry.
一项为期四年的非正式停火于7月开始破裂，当时胡塞武装宣布对沙特实施“海上禁运”，并开始发动导弹和无人机袭击。据胡塞武装控制的卫生部称，自那以后，也门已有约155名平民丧生。这场特定的冲突是在中东更广泛冲突的背景下重新浮出水面的。
This particular conflict has re-emerged on the backdrop of a wider conflict in the Middle East.
美国和以色列于2月对伊朗发动了空袭，炸死了其领导人，并促使德黑兰政权对该地区各地的美国盟友发动袭击进行报复，同时实际上关闭了霍尔木兹海峡。全球约五分之一的石油和天然气通常经由该海峡运输。
The US and Israel launched an air campaign against Iran in February, killing its leader and prompting the regime in Tehran to retaliate with strikes on US allies across the region and the effective closure of the Strait of Hormuz, through which around a fifth of the world's oil and gas usually travels.
6月，美伊达成了一项旨在结束战争并重新开放海峡的初步协议，但在伊朗恢复对船只的袭击且美国恢复封锁后，该协议在几周内破裂。
In June, the US and Iran reached a preliminary agreement to end the war and reopen the strait, but it collapsed within weeks after the Iranian attacks on shipping resumed and the US reinstated its blockade.
在沙特阿拉伯遭到胡塞武装“海上禁运”的加剧下，霍尔木兹海峡的局势已导致油价飙升。
The situation in the Strait of Hormuz has seen oil prices surge, exacerbated by the Houthis' "maritime embargo" against Saudi Arabia.