protein
protein — 名詞
1. A natural substance found in foods such as meat, eggs, fish, cheese, and beans.
蛋白質
食物中助生長修復的營養成分
A natural substance found in foods such as meat, eggs, fish, cheese, and beans. Your body needs it to grow, repair damaged tissues, and stay healthy.
Bao eats eggs and beans every day to get enough protein for his training.
Bao 每天吃雞蛋和豆類，以攝取足夠的蛋白質來應付訓練。
collocation: get enough protein
This brand of yoghurt has twice as much protein as the regular one.
這個品牌的優格蛋白質含量比一般牌子多一倍。
comparative pattern: as much protein as
The doctor told Nikhil to add more protein to his breakfast.
醫生建議 Nikhil 在早餐中加入更多蛋白質。
Milk, fish, and tofu are all good sources of protein for growing children.
牛奶、魚和豆腐都是成長中兒童很好的蛋白質來源。
Many plant-based proteins such as lentils and chickpeas are cheap and easy to cook.
許多植物性蛋白質，例如扁豆和鷹嘴豆，價格便宜又容易烹調。
- nutrient
broader term — any substance that provides nourishment, not just protein
- amino acids
related but not synonymous — amino acids are the building blocks that make up protein
文法句型
protein + in + food type
source of + protein
high in + protein
用法筆記
In everyday use this sense is uncountable ('Protein is important for muscles'). When talking about different kinds of protein-rich foods, it can be countable ('legumes are a good plant protein').
常見錯誤
2. Any of many natural chemical compounds found in all living cells. Made from long
蛋白質分子
由胺基酸組成的天然有機化合物
Any of many natural chemical compounds found in all living cells. Made from long chains of amino acids, each type of protein performs a specific job, such as speeding up chemical reactions, carrying signals, or protecting the body from disease.
Each protein in the human body has a specific shape that allows it to do a particular job.
人體內的每一種蛋白質分子都有特定的形狀，使其能夠執行特定的工作。
relative clause describing protein function
Enzymes are a type of protein that speed up chemical reactions inside cells.
酶是一種能加速細胞內化學反應的蛋白質分子。
pattern: a type of protein that + action
The research team identified a new protein that helps plants survive in dry soil.
研究團隊發現了一種新的蛋白質分子，能幫助植物在乾燥的土壤中存活。
Valentina's lab studies how proteins fold into their three-dimensional shapes.
Valentina 的實驗室研究蛋白質分子如何摺疊成三維立體結構。
A virus uses proteins on the surface of a cell to enter it and cause disease.
病毒利用細胞表面的蛋白質分子進入細胞，進而引起疾病。
- polypeptide
a more specific term — a chain of amino acids that may form part of or be a protein; used in technical contexts
- enzyme
a type of protein that speeds up chemical reactions — narrower than 'protein'
- macromolecule
broader category — includes proteins, nucleic acids, and carbohydrates
文法句型
protein + that + verb/action
type of + protein
protein + in + cell/tissue
用法筆記
This sense is the technical, biological meaning. In academic or scientific writing, 'protein' is countable when referring to individual types ('receptor proteins', 'channel proteins') and uncountable when referring to the substance in general ('Protein makes up 20% of the body').