piece

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

比较义项：部分（名词）。

• part

  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 本词

  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: a musical composition or work (noun).

比较义项：乐曲／作品（名词）。

• piece 本词

  Neutral, everyday word for any musical composition, short or long, casual or classical; extremely common in ordinary speech and music lessons.

  乐曲的中性、日常说法，可指任何长短、正式或非正式的音乐作品，在日常口语和音乐课上都很常用。

  My piano teacher gave me a new piece to practice this week.

  我的钢琴老师这周给了我一首新曲子练习。

• opus

  A formal, somewhat elevated word for a serious or major composition, often identified by an opus number; rarely used for a small or casual piece.

  较为正式、庄重的说法，通常指严肃或重要的作品，常带有作品编号，很少用来指小型或随意的乐曲。

  Beethoven's Ninth Symphony is considered his greatest opus.

  贝多芬的第九交响曲被认为是他最伟大的作品。

Piece and opus both mean a musical composition. Piece is the neutral, everyday word for any composition, casual or classical. Opus is more formal, used for a serious or major work, often identified by a number, and rare for a small or casual piece.

piece 和 opus 在“乐曲、作品”这个意义上意思相近，但语域不同：piece 是中性、日常的说法，可以指任何一首乐曲；opus 更正式庄重，通常指作曲家的重要作品，常与编号连用，日常口语中很少使用。这里不比较 piece 表示“一块、一片”（如 a piece of cake）等其他意义。

Compared meaning: to put parts together to form a whole (verb).

比较义项：拼合、修补（动词）。

• piece 本词

  Usually appears as the phrasal verb 'piece together'; suggests reassembling broken, torn or scattered fragments, often used figuratively for clues or a story.

  通常以短语动词 piece together 出现；表示把破碎、撕裂或散落的碎片重新拼合起来，也常用于比喻意义，例如拼凑线索或故事。

  He carefully pieced together the shattered vase from its broken fragments.

  他小心翼翼地把破碎花瓶的碎片重新拼合了起来。

• assemble

  A standalone, more formal verb for fitting manufactured parts together according to a design or instructions, typically to build furniture, machines or structures.

  一个可独立使用、较为正式的动词，指按照设计或说明把制造好的零件组装起来，通常用于组装家具、机器或结构。

  It took an hour to assemble the new bookshelf from the box.

  从箱子里把新书架组装起来花了一个小时。

Piece and assemble both mean putting parts together to form a whole. Piece usually appears as 'piece together', for broken, torn, or scattered parts put back, often used for clues or a story. Assemble is more formal, for fitting manufactured parts by a design.

这两个词都表示把部件拼在一起组成整体，但语气和用法不同：piece 常以短语动词 piece together 出现，强调把破碎、撕裂或散落的部件重新拼合或修补，动作随意，也常用于比喻意义（如拼凑线索、拼凑出一个故事）；assemble 则强调按照设计或说明把制造好的零件组装成完整的产品或结构，更正式、更有条理。