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- A beta ray. β射线
- Each emission of an alpha or beta ray accompanies the transmutation of an atom; the energy communicated to these rays comes from inside the atom. 每一次a射线或b射线的放射都伴随着原子的蜕变，因为赋予这些射线的能量来自于原子的内部。
- scintillation beta ray spectrometer 闪烁射线谱仪
- Absorbed dose point kernels of beta ray source 放射性核素辐射源的吸收剂量点核函数
- Helical orbit beta ray spectrometer 螺旋形轨道谱仪
- A display device that uses a cathode ray tube. 一种使用阴极射线管的显示装置。
- Radioactive ray is material thing. 放射线是实际的物质。
- The office has been humming with activity. 办公室一直忙着搞活动。
- A ray flower or the corolla of a ray flower. 舌状花舌状花或这种花的花冠
- The threat of war has depressed business activity. 战争的威胁使经济萧条。
- There has been a lot of activity in the town today. 今天市中心相当热闹。
- A ray of sunlight pierced the clouds. 一缕阳光穿透了云层。
- The town was humming with activity. 该市镇生气勃勃，呈现一片热闹的景象。
- I was left without a ray of hope. 我连一线希望也没有了。
- Dosimetry of External Beta Rays for Radiation Protection 射线外照射的辐射防护剂量学
- Her visit brought a ray of sunshine into the children's lives. 她的来访给孩子们的生活带来了欢乐。
- Stamp collecting is my favorite activity. 集邮是我最喜爱的消遣。
- The store was a scene of great activity. 这家商店顾客盈门。
- He once engaged in anti-government activity. 他一度从事反政府的活动。
