When the experiment was done, basic investigations were done on security of using B-mode ultrasound.

在试验进行的同时，对B超使用的安全性做了基本调查。

youdao

When the experiment was done, basic investigations were done on security of using B-mode ultrasound.

在试验进行的同时，对B超使用的安全性做了基本调查。

youdao