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。

youdao

The average level of vitamin D was found at 35.7 nmol/L.

研究发现，维生素D的平均浓度为35.7nmol/L.

youdao

Are you willing to compete at the Ph. D. level?

你愿意在博士级别竞争么？

youdao

Are you willing to compete at the Ph. D. level?

你愿意在博士级别竞争么？

youdao