However, a direct cause-and-effect isn't clear, said the team at the Charite Universitatsmedizin Berlin and of the Physikalisch-Technische Bundesanstalt (PTB), the German National Metrology Institute.

然而，并不能确定者之间有直接的因果联系，德国柏林夏洛蒂医科大学和德国标准计量机构-国立计量研究院的研究团队说。

youdao

However, a direct cause-and-effect isn't clear, said the team at the Charite Universitatsmedizin Berlin and of the Physikalisch-Technische Bundesanstalt (PTB), the German National Metrology Institute.

然而，并不能确定者之间有直接的因果联系，德国柏林夏洛蒂医科大学和德国标准计量机构-国立计量研究院的研究团队说。

youdao