part

Compared meaning: a portion of a whole (noun).

比较义项：部分（名词）。

• part 本词

  Refers to a component or section of a larger whole, often abstract (a story, a plan, a process); does not imply the piece can be physically separated or handed to someone.

  指较大整体中的一个组成部分或方面，常较为抽象（如故事、计划、过程），不一定意味着这部分可以被physically分开或递给别人。

  Losing your job is only part of the problem you're facing.

  失业只是你所面临问题的一部分。

• piece

  Refers to a distinct, often physically separable unit taken from something larger, typically concrete (food, paper, furniture); commonly used with 'of' for portions someone can hold or eat.

  指从较大事物中分离出来的一个独立单元，通常是具体的（如食物、纸张、家具），常与“of”连用，表示可以拿在手里或吃掉的一份。

  Could you cut me a piece of that pizza before it's all gone?

  在披萨吃完之前，能不能给我切一块？

Part and piece both mean a portion of something whole. Piece stresses a separate small unit that can be taken or divided, often something concrete like food or paper. Part is more abstract, a component of a whole that is not always physically separate.

两者都指整体中的一部分，但 piece 更强调可以被分离、拿取或分配的独立小块，常用于食物、纸张等具体物品；part 更抽象，常指整体的一个组成部分或方面，不一定能被物理分开。

Compared meaning: someone's or something's job in an activity (noun).

比较义项：角色，职责（某人或某物在某项活动、工作或系统中所起的作用）（名词）。

• part 本词

  Informal and typically used for someone's role in a play, story, or shared activity; often collocated with 'play' (play a part) or 'take part in'.

  较为口语化，通常指某人在戏剧、故事或共同活动中扮演的角色；常与 play（扮演）或 take part in（参加）搭配使用。

  During rehearsals, he practiced his part until he knew every line by heart.

  排练时，他反复练习自己的角色，直到记住了每一句台词。

• role

  The most general, neutral word for someone's job, position, or duty in a team, organization, or situation; more formal than 'part'.

  是最通用、较中性的词，指某人在团队、组织或某种情境中的工作、职位或职责；比 part 更正式。

  As a nurse, her role is to support patients as well as treat their injuries.

  作为一名护士，她的职责不仅是治疗病人的伤情，还要给予他们支持。

• function

  Focuses on the actual purpose or way something works, and is commonly used for machines, organs, or systems, not just people.

  强调事物实际发挥的作用或运作方式，除了指人以外，也常用于机器、器官或系统，而不仅限于人。

  The main function of a thermostat is to keep the room at a steady temperature.

  恒温器的主要作用是让房间保持恒定的温度。

Part, role, and function can mean a job or duty in an activity. Part is informal, used for a role in a play. Role is the general, neutral word for a job in a team. Function is the real purpose of something, often a machine.

这三个词都可以表示“角色”或“职责”，但语气和使用范围不同：part 多用于戏剧、故事或团队活动中某人所扮演的角色，语气较随意；role 是最通用、较正式的词，常指某人在工作或团队中的职位或职责；function 强调事物或人实际发挥的作用，除了人以外也常用于机器、系统等非生命事物。这里不比较 part 表示“一部分”的意思，也不比较 function 在数学中表示“函数”的意思。

Compared meaning: to split something into parts (verb).

比较义项：分开（动词）。

• part 本词

  Suggests separating something (often a crowd, a couple, or a covering) into two sides so they move apart; less about creating equal portions.

  强调把某物（常指人群、情侣或覆盖物）分开成两边，使其彼此分离；不太强调分成均等的份数。

  The curtains parted slowly, revealing the stage behind them.

  帘子慢慢分开，露出了后面的舞台。

• divide

  Suggests splitting a whole into a specific number of parts or shares, often equal, using a method or calculation.

  强调按照某种方法或计算，把整体分成specific数量的部分或份额，常常是均等的。

  The teacher divided the students into four groups for the project.

  老师把学生分成四组来做这个项目。

Part and divide both mean to split a whole into parts. Part suggests separating something that was joined, like a crowd or a couple, into two sides. Divide suggests splitting a whole into a number of shares, often equal, using some method.

两者都表示把一个整体分成若干部分，但 part 强调让原本连在一起的东西分离（常用于人、群体或事物两侧分开），而 divide 强调按某种方式或标准把整体切分成若干份，常带数量或比例。这里不比较 part 作名词“部分”或 divide 的“使意见分歧”等其他义项。