A1 noun ニュートラル #4,623 よく出る

bacteria

/bækˈtɪəriə/

Bacteria are very small living things that exist almost everywhere. While some can cause diseases and make people sick, many types are helpful for our health and the environment.

例文

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1

You should wash your hands with soap to kill the bacteria.

You should wash your hands with soap to kill the bacteria.

2

The researchers identified several types of bacteria in the water supply.

The researchers identified several types of bacteria in the water supply.

3

Gross, I bet there are so many bacteria on that old sponge!

Gross, I bet there are so many bacteria on that old sponge!

語族

名詞
bacteria
副詞
bacterially
形容詞
bacterial
関連
bacterium
💡

覚え方のコツ

Think of the 'bac' in bacteria and a 'back'—if you have bacteria on your back, you need to wash it!

クイックテスト

The doctor said that the illness was caused by ____.

正解!

正解は: bacteria

例文

1

You should wash your hands with soap to kill the bacteria.

everyday

You should wash your hands with soap to kill the bacteria.

2

The researchers identified several types of bacteria in the water supply.

formal

The researchers identified several types of bacteria in the water supply.

3

Gross, I bet there are so many bacteria on that old sponge!

informal

Gross, I bet there are so many bacteria on that old sponge!

4

The study explores how bacteria develop resistance to common antibiotics.

academic

The study explores how bacteria develop resistance to common antibiotics.

5

Our new cleaning product is guaranteed to eliminate 99% of surface bacteria.

business

Our new cleaning product is guaranteed to eliminate 99% of surface bacteria.

語族

名詞
bacteria
副詞
bacterially
形容詞
bacterial
関連
bacterium

よく使う組み合わせ

harmful bacteria harmful bacteria
beneficial bacteria beneficial bacteria
kill bacteria kill bacteria
spread bacteria spread bacteria
bacterial infection bacterial infection

よく使うフレーズ

good bacteria

healthy microorganisms in the body

gut bacteria

microorganisms living in the stomach/intestines

bacterial growth

the increase of bacteria numbers

よく混同される語

bacteria vs virus

Bacteria are living cells that can live on their own, while viruses need a living host to survive.

bacteria vs bacterium

Bacterium is the singular form (one), while bacteria is the plural form (many).

📝

使い方のコツ

In everyday English, 'bacteria' is often used as a collective noun, but in scientific contexts, it is strictly the plural of 'bacterium'.

⚠️

よくある間違い

Many learners say 'a bacteria', but they should say 'a bacterium' or just 'bacteria' when talking about them in general.

💡

覚え方のコツ

Think of the 'bac' in bacteria and a 'back'—if you have bacteria on your back, you need to wash it!

📖

語源

From the Greek word 'bakterion', meaning 'small staff' or 'rod', because the first bacteria seen under a microscope were rod-shaped.

文法パターン

Plural noun (singular: bacterium) Usually takes a plural verb (e.g., 'Bacteria are...')
🌍

文化的な背景

In modern health culture, people often distinguish between 'bad' bacteria that cause illness and 'good' bacteria found in foods like yogurt.

クイックテスト

The doctor said that the illness was caused by ____.

正解!

正解は: bacteria

Healthの関連語

head

A1

The upper part of the human body that contains the brain, eyes, ears, nose, and mouth. It is supported by the neck and is the center for the senses and thinking.

ear

A1

The ear is the organ on the side of the head that humans and animals use to hear sounds. It also helps the body maintain its sense of balance.

mouth

A1

The opening in the lower part of the human face, surrounded by the lips, through which food is taken in and sounds and speech are emitted. It contains the teeth and the tongue and is the beginning of the digestive tract.

tooth

A1

A tooth is one of the hard, white objects in your mouth used for biting and chewing food. Humans have two sets of teeth during their lives: primary (baby) teeth and permanent (adult) teeth.

shoulder

A1

The shoulder is the part of the human body where the arm connects to the trunk. It consists of a large joint that allows the arm to rotate and move in many directions.

finger

A1

One of the five long, thin parts at the end of the human hand. Fingers are used for feeling, touching, and gripping objects.

stomach

A1

The organ in your body where food goes after you eat it to be broken down. It is also the front part of your body below the chest and above the legs.

leg

A1

A leg is one of the long parts of the body that humans and animals use for standing, walking, and running. It refers to the entire limb starting from the hip down to the ankle.

foot

A1

The foot is the part of the body at the bottom of the leg that a person stands on. It is used for balance, walking, running, and jumping.

toe

A1

A toe is one of the five separate parts at the end of the human foot. They help provide balance and support the weight of the body while standing or walking.

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