词性意思:
adv. 本质上本来He was, essentially, a teacher, not a manager.
他本质上来说是个教师而不是经理。
The course is essentially theoretical in orientation.
该课程的目标基本上是理论性的。
The book is essentially a taster for those unfamiliar with the subject.
这本书基本上是让那些不熟悉该学科的人对其有个初步的了解。
The bulk of the text is essentially a review of these original documents.
正文的大部分基本上是对这些原始文献的回顾。