a piece of paper
表示纸张的计量，不可数名词paper与piece连用。
Could you give me a piece of paper?
你能给我一张纸吗？
纸
papers — plural of paper
报纸；论文；文章；报告；布；票据；证券；纸币；纸包；纸袋
a thin material made from plant fibres, used for writing, printing, wrapping, and packaging
A sheet material typically used for writing on or printing on (or as a non-waterproof container), usually made by draining cellulose fibres from a suspension in water.
主要由木材、破布或某些草类制成的纤维素浆材料
a material made of cellulose pulp derived mainly from wood or rags or certain grasses
An open hand (a handshape resembling a sheet of paper), that beats rock and loses to scissors. It loses to lizard and beats Spock in rock-paper-scissors-lizard-Spock.
一篇文章(尤其是作为作业写的)
an essay (especially one written as an assignment)
A written document, generally shorter than a book; usually written as a school assignment or a government report.
每日或每周出版的折叠纸张刊物,包含新闻、文章和广告
a daily or weekly publication on folded sheets; contains news and articles and advertisements
A written document that reports scientific or academic research and is usually subjected to peer review before publication in a scientific journal (as a journal article or the manuscript for one) or in the proceedings of a scientific or academic meeting (such as a conference, workshop, or symposium).
Any financial assets other than specie, including paper money, commercial paper, and others.
A paper packet containing a quantity of items.
A medicinal preparation spread upon paper, intended for external application.
A substance resembling paper secreted by certain invertebrates as protection for their nests and eggs.
I need to buy some paper for the printer.
我需要为打印机买一些纸。
用法提示：paper作不可数名词，意为“纸”。
He reads the paper every morning.
他每天早上读报纸。
用法提示：paper作可数名词，意为“报纸”。
She wrote a paper on climate change.
她写了一篇关于气候变化的论文。
用法提示：paper作可数名词，意为“论文”。
表示纸张的计量，不可数名词paper与piece连用。
Could you give me a piece of paper?
你能给我一张纸吗？
paper作可数名词，指学术论文。
She is writing a paper on climate change.
她正在写一篇关于气候变化的论文。
固定短语，表示理论上或书面形式。
This plan looks good on paper.
这个计划在纸面上看起来不错。
较厚且坚硬的纸板，常用于制作盒子或包装，不能像普通纸一样书写。
非常薄且柔软的纸，常用于包装易碎物品或擦拭，不适合书写。
一种棕色、坚韧的纸，常用于制作购物袋或工业包装。
grammar · medium
易错句子Please give me a paper.
正确表达Please give me a piece of paper.
当 paper 表示'纸'时为不可数名词，不能用 a 直接修饰，应使用 a piece of paper 或 some paper。
grammar · medium
易错句子I wrote the sentence in the paper.
正确表达I wrote the sentence on the paper.
表示'在纸上写'应该用介词 on 而不是 in。in the paper 通常指在报纸或文章中。
paper可指纸或论文，而document强调正式文件或证据
paper侧重学术短文，article更泛指报刊或网页上的文章
一张纸
Could you give me a piece of paper?
你能给我一张纸吗？
书写纸
I need some writing paper for my letter.
我需要一些书写纸来写信。
纸袋
She put the groceries in a paper bag.
她把食品杂货放进一个纸袋里。
再生纸
We should use recycled paper to help the environment.
我们应该使用再生纸来保护环境。
纸巾
He used a paper towel to clean the spill.
他用纸巾清理了泼洒的液体。
在纸上；理论上
The plan looks good on paper.
这个计划在纸上看起来不错。
纸和笔常用在一起写作或绘画
纸是书的主要材料，书由多张纸组成
在纸上书写是纸张的主要用途之一
纸张常用于打印文档或图片
文件通常记录在纸上，是纸张的重要应用
理论上
The plan looks good on paper, but it may not work in practice.
这个计划在理论上看起来不错，但实际上可能行不通。
掩饰
They tried to paper over their differences, but the tension was still there.
他们试图掩饰分歧，但紧张气氛依然存在。
纸老虎
The dictator was a paper tiger; his regime collapsed quickly.
独裁者是个纸老虎，其政权迅速垮台。
我像纸一样飞，像飞机一样高。
In the song 'Paper Planes', she sings about flying like paper.
在歌曲《纸飞机》中，她唱道像纸一样飞翔。
布，石头，剪刀！
We played paper, rock, scissors to decide who goes first.
我们玩石头剪刀布来决定谁先走。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY, WORDNET.