under construction
The phrase "由...组成" is a common structure in Chinese used to indicate the composition or formation of a whole from its parts. It translates to "is composed of" or "is made up of" in English. This structure is typically used to describe the elements that constitute a group, organization, or object.
Explanation: Here, "由" introduces the components (teachers and students) that make up the class.
这篇文章由三个部分组成。
Explanation: The structure indicates that the article consists of three distinct sections.
这张试卷是由十道选择题和一道写作题组成的。
This structure is particularly useful in academic, formal, and descriptive contexts where clarity about the components of a whole is necessary. It helps in organizing information and providing a clear understanding of how different parts contribute to the entirety.