My favorite subject is physical science.

我最喜爱的科目是物理学。

He doesn't, he says physical science is extremely valuable.

但是他并没有这么说，他认为自然科学极具价值。

Joule's work led to one of the basic laws of physical science.

焦耳的工作引导出自然科学的一个基本定律。

Then, almost every Sunday, came Sitanath Dutta to give us demonstrations in physical science.

接着，几乎每个星期天，悉达那德? 杜塔来给我们上物理实验课。

We face a similar situation in U. S. education in math, physical science, and engineering.

在美国的数学、自然科学和工程教育中，我们面对着类似的情况。