组成
水由氢和氧组成。
Water is formed from hydrogen and oxygen.
to form or constitute something by combining parts
这个团队由五名成员组成。
This team is formed by five members.
这本书由十个章节组成。
This book is composed of ten chapters.
Often used in scientific, technical, or formal contexts to describe the composition of systems, substances, or groups.
Related Phrases
Pro Tip
Common Structure
The most frequent pattern is 'X由Y组成' (X is formed by Y). For example, '这部电影由三个部分组成' (This movie is composed of three parts).
Gold Rule
Passive Voice Preference
In formal Chinese, '由...组成' is preferred over active voice constructions when describing composition. Avoid '组成Y' alone without specifying the composed entity.
Word Origin
组 (zǔ) means 'to organize' or 'group', and 成 (chéng) means 'to become' or 'to complete'. Together, they convey the idea of assembling parts into a whole.
Usage Notes
Used for both physical compositions (e.g., chemical compounds) and abstract groupings (e.g., teams, committees). The passive voice '由...组成' is very common in formal writing.