1
a quantity of + noun
当a quantity of后接不可数名词时，谓语动词用单数；后接可数名词复数时，谓语动词用复数。
A large quantity of food was wasted.
大量食物被浪费了。
数量；量；份量
先理解核心含义，再看它在真实句子里的用法。
数量；量；份量
An amount or number of something, especially when it can be counted or measured.
A large quantity of food was wasted.
大量食物被浪费了。
用于指称标量、向量、物品数量或集合价值的测量(计数、数量)的基本通用术语。
A fundamental, generic term used when referring to the measurement (count, amount) of a scalar, vector, number of items or to some other way of denominating the value of a collection or group of items.
可以量化的事物的数量或多少
how much there is or how many there are of something that you can quantify
某物的不确定数量。
An indefinite amount of something.
足够或大量
an adequate or large amount
The recipe requires a small quantity of salt.
这个食谱需要少量的盐。
AI contextual example
The store sells goods in large quantities at a discount.
这家商店大量出售商品，价格有折扣。
AI contextual example
In physics, the quantity of motion is called momentum.
在物理学中，运动的量称为动量。
AI contextual example
he had a quantity of ammunition
他有一批弹药
WordNet
当a quantity of后接不可数名词时，谓语动词用单数；后接可数名词复数时，谓语动词用复数。
A large quantity of food was wasted.
大量食物被浪费了。
通常用于描述购买、生产等行为。
The company buys raw materials in large quantities.
该公司大量购买原材料。
通常与定冠词连用，强调特定数量。
The quantity of water in the tank is decreasing.
水箱中的水量正在减少。
Not this
The quantity of this product is excellent.
Use this
The quality of this product is excellent.
因为“quantity”（数量）和“quality”（质量）在拼写和发音上相似，但含义不同。此处表达的是产品质量，应使用“quality”。
Not this
The quantity of students in the class is 30.
Use this
The number of students in the class is 30.
当描述可数名词的数量时，英语中通常用“number”而非“quantity”。“Quantity”多用于不可数或整体概念。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
大量的
A large quantity of water was wasted.
大量的水被浪费了。
大量地，成批地
It's cheaper to buy in quantity.
批量购买更便宜。
未知数；未知因素
The new manager is still an unknown quantity.
新经理还是个未知数。
……的数量
The quantity of books in the library is impressive.
图书馆里书籍的数量令人印象深刻。
估算员，工料测量师
The quantity surveyor estimated the cost of the project.
估算员估算了项目的成本。
小量，少量
Add a small quantity of salt to the soup.
往汤里加少量盐。
已知量；可预测的人或事物
After working with him for years, he is a known quantity in the team.
与他共事多年后，他在团队中是一个已知量。
未知量；难以预测的人或事物
Her performance in the new role is still an unknown quantity.
她在新岗位上的表现仍是一个未知量。
数量本身就有其质量。
This phrase is often used to argue that a large number of something can compensate for deficiencies in quality, and it appears in various contexts of pop culture, including video games and military strategy discussions.
这句话常被用来论证大量的数量可以弥补质量上的不足，并出现在电子游戏和军事战略讨论等多种流行文化语境中。
Use quantity naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
quant- 联想‘全部’，-ity 表示性质，‘全部的性质’即‘数量’。
neutral
表示‘数量’时，通常不可数；表示‘一批、大量’时，可数。常用结构：a quantity of, quantities of。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.