Word · Frequency #4650
bacteria
细菌
bacteria is the plural of bacterium.
核心释义
医学术语也指无芽胞杆菌属
A single-celled or noncellular microorganism without chlorophyll that reproduces by fission; important as pathogens and for biochemical properties.
- 1.
具有细胞壁但无细胞核或细胞器的单细胞生物
A single-celled organism with cell walls but no nucleus or organelles.
- 2.
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
(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
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
用法In use
A single bacterium can multiply rapidly under favorable conditions.
用法提示：此处使用单数形式 bacterium，指单个细菌。
Certain bacteria are essential for the digestion of food in the human body.
用法提示：此处使用复数形式 bacteria，指一类细菌。
The scientist observed the bacterium under a microscope.
用法提示：此处使用单数形式 bacterium，强调单个个体。
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。
相关词与表达Connections
搭配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
学习提示Learner notes
记忆技巧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。
语境与语域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。
发音与拼写Pronunciation & Spelling
All words end in '-ium' but have different stressed vowels; none rhymes with 'bacterium'.
一起学习词形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.