Douglas McCauley is an assistant professor of several environmental and life sciences.

道格拉斯·麦考利 (Douglas McCauley) 是多个环境和生命科学领域的助理教授。

I mean he's not involved in the social sciences, life sciences, or physical sciences.

我的意思是他不涉及社会科学、生命科学或物理科学。

I guess because he's not in " the social sciences, life (life) sciences, " or physical sciences.

我猜是因为他不在“社会科学、生命（生命）科学”或物理科学领域。