The principal question in drug design is how to study the ligand-binding sites and others because of the poor structure information.
如何在生物胺受体结构数据严重匮乏的基础上研究受体的配基结合位点及其它功能位点,已成为药物设计中的关键问题。
The principal drivers have been largely external rather than internal, calling into question whether those principals are core to the companies DNA.
主要的推动因素在很大程度上一直是外部而不是内部的,对这些推动因素是否是企业DNA的核心一直是有疑问的。
But others question the likelihood of success without reducing the principal.
但是有人质疑,在不降低本金的情况下,这样做成功的可能性有多大。
National Public Radio asked exactly this question in a survey a year or so ago and they got the following principal responses back.
国家公共广播电台问过,完全相同的问题,在一次一年前的民意调查中,他们得到了如下的回复
That's a good question. As a parent or as a principal?
这个问题很好。从父母还是校长的角度来说呢?
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