名词

在理发店

男士剪发

女士美容

1. 头发
Your hair is the fine threads that grow in a mass on your head.

2. 毛发;汗毛;体毛
Hair is the short, fine threads that grow on different parts of your body.

3. （动物的）毛;（马的）鬃，鬣
Hair is the threads that cover the body of an animal such as a dog, or make up a horse's mane and tail.

4. （昆虫、植物上的）茸毛
Hairs are short, very fine threads that grow on some insects and plants.

Hair can be both a count and an uncount noun. When you are describing people, you usually use the uncount sense. She has long blonde hair and blue eyes. ...the girl with red hair and freckles. However, when you particularly want to refer to one or several of the individual strands that grow from your head or body, you can use the count sense. There were some blonde hairs in the car... a single fibre thinner than a hair.
hair 既可作可数名词，又可作不可数名词。用来描述人时，通常取不可数名词的意思，如：She has long blonde hair and blue eyes（她有着长长的金发和蓝色的眼睛），the girl with red hair and freckles（一头红发面带雀斑的女孩）。但如果要特指头上或身上的某一缕或几缕毛发，就取可数名词的意思，如：There were some blonde hairs in the car（车里有几根金发），a single fibre thinner than a hair（一根比头发丝还要细的纤维）。

1. a filamentous projection or process on an organism

2. cloth woven from horsehair or camelhair
used for upholstery or stiffening in garments

Synonym: haircloth

3. any of the cylindrical filaments characteristically growing from the epidermis of a mammal

e.g. there is a hair in my soup

Synonym: pilus

4. a covering for the body (or parts of it) consisting of a dense growth of threadlike structures (as on the human head)
helps to prevent heat loss

e.g. he combed his hair
each hair consists of layers of dead keratinized cells

5. filamentous hairlike growth on a plant

e.g. peach fuzz

Synonym: fuzztomentum

6. a very small distance or space

e.g. they escaped by a hair's-breadth
they lost the election by a whisker

Synonym: hair's-breadthhairsbreadthwhisker