At present, most of the reports about the mechanism of HBV intrauterine transmission are descriptivestudies.
有关HBV宫内传播机制,国内外文献多为描述性研究。
2
And I'm not expecting journalists to go to academic research databases to conduct large complex descriptivestudies.
并且我不希望记者们进入学术研究的数据库去做更大更复杂的描述性的研究。
3
It is acknowledged that, in many areas, evidence is generally confined to case reports, observational or descriptivestudies, and poorly controlled or uncontrolled studies.