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Background— Systemic lupus erythematosus is associated with premature atherosclerosis and ascular stiffening. Whether SLE alters left entricular structure and function in the absence of alular and clinical coronary artery disease is unknown.

背景：系统性红斑狼疮和早期的动脉硬化及血管僵硬有关，但是SLE对不伴有瓣膜疾病或者临床诊断的冠状动脉疾病患者的左心室是否有影响尚未见报道。

BACKGROUND: Alzheimer's disease pathology is common in patients with amnestic mild cognitive impairment without dementia, but the prevalence of AD pathology in patients with subjective cognitive impairment and non-amnestic mild cognitive impairment is unknown.

背景：阿尔茨海默病的病理改变在伴遗忘型轻度认知功能障碍的非痴呆患者较为常见；然而，伴主观性认知功能损害和非遗忘型轻度认知功能障碍患者AD病理改变情况仍不清楚。

Summary of Background Data. Aneurysmal bone cyst is a rapidly expanding and destructive bone lesion of unknown etiology.

背景知识概要：动脉瘤样骨性囊肿的快速生长及骨破坏的病因并不清楚。

BACKGROUND: The optimal duration of dual antiplatelet therapy after percutaneous coronary intervention is unknown.

背景：在经皮冠状动脉介入后，双重抗血小板治疗的最佳时间仍属未知。

Background— The effect of prearrest left ventricular ejection fraction on outcome after cardiac arrest is unknown.

背景——停跳前的左室射血分数对心脏骤停预后的影响尚未明了。

To know all the performing arts circle behind the secrets behind the most pungent unknown, only drove the background of the studio.

要知道所有演艺圈最辛辣不为人知的幕后秘辛，就只有直捣摄影棚的后台。

Background: The pathologic features of ulcerative colitis in patients with primary sclerosing cholangitis are, essentially, unknown.

背景：患有原发性硬化性胆管炎的患者，其溃疡性结肠炎的病理特征仍不明了。

They bristled with unknown perils, and he gazed at them, fascinated, till their dazzle became a background across which moved a succession of forecastle pictures, wherein he and his mates sat eating salt beef with sheath-knives and fingers, or scooping thick pea-soup out of pannikins by means of battered iron spoons.

他出神地凝视着它们，直望到它们的光芒形成了一个背景，在这背景上出现了一系列前甲板的场景：他和伙伴们用刀子和手指吃着咸牛肉，拿用瘪了的匙子从盘里舀着浓酽的豌豆汤。

According to the application background of the 7000 m manned underwater vehicle and with monocular CCD cameras as sensors, two visual station keeping methods for underwater vehicle are proposed, i.e. the model-based monocular vision positioning for the target when model is known, and the feature-based visual servoing for the target when model is unknown.

以7000m载人潜水器的水下悬停为应用背景，以单目CCD摄像机为传感器，提出了基于模型的单目视觉定位和基于特征的视觉伺服两种水下机器人视觉悬停技术方案，分别适用于已知模型的观察目标和未知模型的观察目标两种情况。

Background The effect of screening with prostate-specific–antigen testing and digital rectal examination on the rate of death from prostate cancer is unknown.

背景：前列腺特异抗原筛查和直肠指检对于前列腺癌死亡率的影响尚无结论。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。