Background: Palliation of malignant gastric outlet obstruction remains challenging.
背景：对于恶性胃出口梗阻的缓解尚有困难。
The outlook for 2003 remains challenging, despite an expected turn-around in the domestic economy.
展望2003年，本地经济可望复苏，但经营环境依然充满挑战。
Proving metal allergy remains challenging in the absence of definitive clinical or histopathologic diagnostic criteria.
检验金属过敏症仍然缺乏权威的临床或者组织病理学诊断标准。
Acquiring and interpreting densitometry data from younger patients remains challenging and should be performed in experienced pediatric densitometry centers.
年幼者密度测定数据的获得和解读仍颇具挑战性，因此这项工作应在有经验的儿科密度测定中心进行。
Scott Mushkin, a Jefferies analyst, estimates Safeway will generate more than $1 billion in free cash flow per year for the next five years even if business remains challenging.
杰弗里公司的分析师司各特·慕士金估计，即使面临行业竞争，西夫韦未来5年里每年也都会产生十多亿的自由现金流。
McQueen turns 40 next week, so he is no longer an enfant, though his work remains challenging and confrontational, especially this season, when it seems like the right moment for a deeper exploration.
麦奎因先生下周满40岁，因此他不再是小孩子，虽然他的工作仍然充满挑战和对抗，特别是本赛季，他似乎进入了一个更深的探索区域。
While much work remains, trends in recent years indicate the PLA is beginning to operationalize its modern force, taking on new and more challenging missions.
尽管还有很多工作要做，但近年来的趋势表明，解放军正开始将其现代化部队投入运营，承担新的、更具挑战性的任务。
Much remains to be learned, though, about whether and to what extent video-induced thinking improvements aid other skills, such as pilots’ ability to land airplanes in challenging conditions.
对于视频诱导下的思维加速能否以及在多大程度上提高其他能力，例如飞行员驾驶飞机在富有挑战的环境降落，科学家仍有很多东西需要去了解和探索。
Much remains to be learned, though, about whether and to whatextent video-induced thinking improvements aid other skills, such as pilots’ability to land airplanes in challenging conditions.
对于视频诱导下的思维加速能否以及在多大程度上提高其他能力，例如飞行员驾驶飞机在富有挑战的环境降落，科学家仍有很多东西需要去了解和探索。
Obtaining observing time on one of the newer, more powerful 8-meter telescopes or on the HST was, and remains, more challenging.
对于获得更新更大的8米级望远镜或者哈勃太空望远镜的观测时间仍具有挑战性。
But with continued ground fighting in contested areas, helping the rebels remains a challenging and complicated goal.
但是持续地战斗在有争议的地区，帮助叛军，这仍然是一个具有挑战性并且复杂的目标。
Most existing vaccines elicit a targeted antibody response, but safely activating cellular immunity against many infectious diseases remains a challenging task.
多数现存疫苗所引发的是特定抗体反应，至于想要安全活化细胞免疫，来对抗许多传染病，目前还是一项挑战。
Overall we are performing well in what remains a challenging operating environment, highlighting the resilience of our business and the success of our growth strategy.
整体而言，我们在仍然充满挑战的经营环境中表现良好，突显了我们业务的反弹，以及我们战略的成功。
The outlook for the last quarter remains more challenging.
最后一个季度的前景仍然更具挑战性。
The shoulder remains one of the more challenging joints for clinicians to clearly identify, diagnose, and treat within the athletic population.
肩依然是临床医生的一个更具挑战性关节明确确定，诊断和治疗在体育人口。
Background: Perforation of the esophagus remains a challenging clinical problem.
背景：食管穿孔仍然是富有挑战性的临床难题。
Background: Perforation of the esophagus remains a challenging clinical problem.
背景：食管穿孔仍然是富有挑战性的临床难题。
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