Preoperatie mechanical bowel preparation before colorectal surgery is a widely - practised treatment , but its efficacy has neer been proen outside obserational studies and animal experiments 结直肠手术术前机械性肠道准备是一个广泛使用的常规处理，但除了观察性研究和动物实验，其效用并未被证实。
They were also at eleated risk of adanced prostate cancer compared with neer users , reported karla a . lawson , ph . d . , of the national cancer institute here , and colleagues 美国国家癌症研究所的karlaa . lawson公共卫生博士及其同事报告说，在患晚期前列腺癌风险升高方面将这些人与从不服用补充剂的人进行了比较。
Neer just memorize single english words . learn by heart the whole sentences and the phrases that contain the new words so we may know how to use the words 看英文电影,收看英语电视节目,听英文歌曲和在某些特定场景学习英语也是很棒和很生动的英语学习方式,因为这样我们可以把所学英语与某些特定的场景联系起来以加深记忆
Married adults were less likely to hae used cocaine or other street drugs in their lifetime or in the past year , compared to those who were neer married , widowed / diorced / separated , or cohabitating 与那些未婚包括单身、离婚、分居或同居的成年人相比，已婚成年人在一生中或过去一年中吸食可卡因或其他街头毒品的情况更少一些。
The study shows that surgeons who hae a history of playing ideo games for more than three hours per week may be faster and more accurate in certain ideo - assisted surgery training tests than surgeons who hae neer played ideo games 研究显示，有每周玩视频游戏3小时以上经历的外科医生，在影像协助的外科训练测验中，比从不玩视频游戏的外科医生技术更快更精确。
Therefore , my thesis is under the recognition of that poverty is not simply an economic issue , but also a social problem . the study of poverty will definitely nee d the joint effort among economists , anthropologists and sociologists 由此看来，贫困不仅是经济问题，更是社会问题；研究贫困不能仅靠经济学家，更应该由人类学家、社会学家来对此问题做出共同努力。
