The BISAC system is maintained by the book Industry Study Group, which classifies books into 52 broad categories, each with additional levels of specificity.
BISAC分类体系是由图书工业研究小组(Book IndustryStudy Group)维护的，它把图书分为52大类，每一类下面又有进一步的细分。
Men in the Copenhagen study maintained a stable body weight over the two week period — but they were specifically instructed to attempt to do so.
在哥本哈根研究中，男人们在两个星期多内保持了稳定的体重——但他们是被特别指示尝试这样做的。
A 15-year study found that middle-aged women who walked for at least an hour a day maintained their weight over the decades.
一项为期15年德研究发现，每天至少步行一小时的中年妇女在过去十年中保持了她们的体重。
Conclusions: in this pivotal phase 3 study, the octreotide implant maintained reduced blood levels of GH and IGF-1 with continuous octreotide release over 6 months, which was well tolerated.
结论：在这个关键的3期研究中，奥曲肽植入物通过6个月持续释放奥曲肽，维持血gh和igf—1水平降低，并且耐受性良好。
Her academic record was constantly maintained at the top level, which resulted from her devotion to study and intelligent nature.
她的学习成绩一直名列前茅，这归功于她对学习的投入和天生的聪慧。
A possible advantage of gene transfer is that a single treatment could last for months. in the current study improvements were maintained through the24weeks of study.
基因转移的潜在优势是单次治疗能持续数月。而在本研究中，疗效能够维持研究所需的24周。
This improvement was maintained throughout the duration of the study with different levels for each group.
这种改善的状态贯穿整个研究，每一组的水平不同。
A great deal of attention had been paid on the stability of plantation in the world. Whether the long-term productivity could be maintained was an important aspect in the study on plantation.
国内外普遍关注人工林的稳定性问题，人工林长期生产力能否维护是当前人工林研究上的一个重要方面。
In the study, individuals who didn't exercise during weight regain experienced significant deterioration in metabolic health, while those who exercised maintained improvements in almost all areas.
研究显示，那些在体重反弹后不锻炼的人身体代谢机能严重下降，而继续运动的人几乎所有代谢机能都有所改善。
While studying at the school, in addition to serious study of the culture of professional knowledge, I have always maintained a strong interest in computers.
在校期间，除了认真学习本专业文化知识以外，我一直对计算机保持浓厚的兴趣。
But when the researchers analyzed the results further, they discovered a group of super losers who shed five times more weight than other participants and maintained that loss throughout the study.
但使当研究者们进一步分析结果时候，他们发现一群体重减低超过5倍于其他的参与者并且在研究过程中一直保存这这种减低的超级减肥者。
She maintained that eloquence could only be acquired by those who made it their study in early youth, while Cromwell declared that there was no eloquence but that which sprang from the heart.
那女士坚称，不是年纪轻轻就研习，不可能雄辩滔滔；克伦威尔则说，言出由中，才能雄辩。
She maintained that eloquence could only be acquired by those who made it their study in early youth, while Cromwell declared that there was no eloquence but that which sprang from the heart.
那女士坚称，不是年纪轻轻就研习，不可能雄辩滔滔；克伦威尔则说，言出由中，才能雄辩。
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