People with low Vitamin D level are more susceptible to infection.
维生素D含量比较低的人更容易生病。
On the other hand, if those late-developed regions without enough high absorptive capacity can strengthen their own R&D level, they may sustain their technological catching-up at some rate.
另一方面，当吸收能力不强时，如果后进地区能加强自身的研发积累，也能维持一定速度的技术追赶。
The Ring-opening polymerization(ROP) of D-lactide(D-LA) catalyzed by bifunctional thiourea catalyst has been studied by performing density functional theory calculations at the B3LYP/6-31G(d) level.
用密度泛函理论在B3LYP/6-31G（d）水平上研究了双官能团硫脲催化丙交酯开环聚合反应的微观机理。
Are you willing to compete at the Ph. D. level?
你愿意在博士级别竞争么？
Are you willing to compete at the Ph. D. level?
你愿意在博士级别竞争么？
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