Word · Frequency #4650
bacteria
细菌
bacteria is the plural of bacterium.
A single-celled or noncellular microorganism without chlorophyll that reproduces by fission; important as pathogens and for biochemical properties.
医学术语也指无芽胞杆菌属
- 1.
A single-celled organism with cell walls but no nucleus or organelles.
具有细胞壁但无细胞核或细胞器的单细胞生物
- 2.
(microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants
单细胞或无细胞结构的球形、螺旋形或杆状微生物,无叶绿素,分裂繁殖,是重要病原体,具生化特性,分类困难,常被视为植物
具有细胞壁但无细胞核或细胞器的单细胞生物；单细胞或无细胞结构的球形、螺旋形或杆状微生物,无叶绿素,分裂繁殖,是重要病原体,具生化特性,分类困难,常被视为植物；细菌；[医] [无芽胞]杆菌属
In use
A single bacterium can multiply rapidly under favorable conditions.
Certain bacteria are essential for the digestion of food in the human body.
The scientist observed the bacterium under a microscope.
bacterium + is
bacterium 是单数形式，谓语动词用单数。
This bacterium is resistant to antibiotics.
这种细菌对抗生素有抗药性。
a bacterium that...
使用 that 引导的定语从句修饰 bacterium。
A bacterium that causes disease can be harmful.
一种引起疾病的细菌可能是有害的。
bacteria are
复数形式 bacteria 更常用，谓语动词用复数。
Connections
Collocations
- harmful bacteria
- 有害细菌
- Harmful bacteria can cause food poisoning.有害细菌会导致食物中毒。
- bacteria multiply
- 细菌繁殖
- Bacteria multiply rapidly in warm conditions.细菌在温暖条件下迅速繁殖。
- antibiotic-resistant bacteria
- 抗药性细菌
- Antibiotic-resistant bacteria are a serious health threat.抗药性细菌对健康构成严重威胁。
- a single bacterium
- 单个细菌
- A single bacterium can multiply into millions.一个细菌可以繁殖成数百万。
- bacteria cause disease
- 细菌致病
- Many bacteria cause diseases in humans.许多细菌会导致人类疾病。
Synonyms
Learner notes
Memory Tip
词尾-um表示单数（如museum），bacterium就是单个细菌，复数bacteria去掉-um加-a。
Context & Register
该词通常用于正式或学术语境，多见于生物学、医学等专业领域，在口语中较少使用。
Pronunciation & Spelling
All words end in '-ium' but have different stressed vowels; none rhymes with 'bacterium'.
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.