It's the house physician who researched phraseology then chose them.

是住院医生研究了措词后选择了它们。

The house physician didn't care about his words.

住院医生并不在意他的话。

The house physician comforted him that it was only physics made by phosphorus or phosphate.

住院医生安慰他那是由磷或磷酸盐产生的物理现象。