1
a kilogram of + [noun]
a kilogram of 后接物质名词或复数可数名词，表示重量。
I bought a kilogram of apples.
我买了一公斤苹果。
千克；公斤
先理解核心含义，再看它在真实句子里的用法。
千克；公斤
kilogram
I bought a kilogram of apples.
我买了一公斤苹果。
In the International System of Units, the base unit of mass; conceived of as the mass of one litre of water, but now defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10−34 when expressed in units of kg⋅m2⋅s−1. Symbol: kg
一千克；国际单位制采用的基本质量单位
one thousand grams; the basic unit of mass adopted under the Systeme International d'Unites
The package weighs about one kilogram, so the shipping cost should be low.
这个包裹大约重一千克，所以运费应该很低。
AI contextual example
She bought two kilograms of apples at the market.
她在市场买了两公斤苹果。
AI contextual example
To make this cake, you need exactly half a kilogram of flour.
做这个蛋糕，你需要正好半公斤面粉。
AI contextual example
a kilogram is approximately 2.2 pounds
一公斤大约等于2.2磅。
WordNet
a kilogram of 后接物质名词或复数可数名词，表示重量。
I bought a kilogram of apples.
我买了一公斤苹果。
千克是可数名词，数字后通常用复数 kilograms。
The package weighs two kilograms.
这个包裹重两公斤。
per kilogram 是正式用法，常用于表示单价或比率。
The price is ten yuan per kilogram.
价格是每公斤十元。
Not this
I bought two kilogram of rice.
Use this
I bought two kilograms of rice.
kilogram 是可数名词，大于 1 的数目后要用复数形式 kilograms；中文没有复数变化，所以学习者容易漏掉 -s。
Not this
This is a five-kilograms bag.
Use this
This is a five-kilogram bag.
数词加 kilogram 作前置定语修饰名词时，要用单数并加连字符（如 five-kilogram），不能保留复数的 -s。
Not this
I need kilogram of sugar.
Use this
I need a kilogram of sugar.
kilogram 是单数可数名词，在 a kilogram of ... 结构中必须带不定冠词 a/an，不能像中文里“千克”那样直接省略冠词。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
一公斤的
I bought a kilogram of apples at the market.
我在市场上买了一公斤苹果。
每公斤
The shop charges 30 yuan per kilogram for oranges.
这家店的橙子每公斤30元。
重一公斤
This bag weighs a kilogram.
这个包重一公斤。
半公斤
She added half a kilogram of flour to the mixture.
她往混合物里加了半公斤面粉。
一公斤重的物体；公斤砝码
The gym has a set of kilogram weights.
健身房有一组公斤级的杠铃片。
Use kilogram naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
kilo 就是“千”，gram 就是“克”；一千克正好一公斤，想象一升水的重量。
语域：neutral 常见场景：科学计量、日常购物、烹饪 kilogram 是公制基本质量单位，多用于正式文件、科学场合及日常购物；整体语气中性，正式和非正式语境都常见。
All listed words end in /-ɡræm/ and rhyme with the final stressed syllable of 'kilogram' (/-ˌɡræm/). They share the exact spelling '-gram'. Beware of lookalikes like 'kilometer' or 'kiloliter': they share the prefix 'kilo-' but have unrelated endings and do NOT rhyme.
Dictionary facts from ECDICT, WIKTIONARY.