1
generate/focus/use + an electron beam
electron beam前常用不定冠词an。
The microscope generates a focused electron beam.
显微镜产生聚焦的电子束。
电子束
electron beams — plural of electron beam
先理解核心含义，再看它在真实句子里的用法。
电子束
a stream of electrons emitted from a cathode or produced by ionization
The microscope generates a focused electron beam.
显微镜产生聚焦的电子束。
常用于电子显微镜、电子束焊接等
阴极射线的同义词
Synonym of cathode ray.
In an electron microscope, an electron beam is used to magnify tiny structures.
在电子显微镜中，电子束被用来放大微小的结构。
The electron beam can be precisely controlled to etch patterns on a silicon wafer.
电子束可以被精确控制，以在硅片上刻蚀图案。
Researchers focused the electron beam onto the sample to analyze its composition.
研究人员将电子束聚焦到样品上，以分析其成分。
electron beam前常用不定冠词an。
The microscope generates a focused electron beam.
显微镜产生聚焦的电子束。
An electron beam is used to weld metal parts.
电子束用于焊接金属零件。
表示使用工具时用with。
The sample is scanned with an electron beam.
样品用电子束扫描。
Not this
Electron beam is used in electron microscopes.
Use this
An electron beam is used in electron microscopes.
“electron beam”是可数名词短语，在单数形式前需要加不定冠词“an”。
Not this
The microscope uses an electrical beam to scan the sample.
Use this
The microscope uses an electron beam to scan the sample.
在科技英语中，固定术语是“electron beam”，而不是“electrical beam”。“electron”作为名词修饰“beam”，表示由电子组成的束流。
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可数名词
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.