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- Aluminium can be transformed,by the capture of an alpha particle and the emission of a proton,into a stable silicon atom. 铝可以通过俘获取粒子、排出质子而被蜕变成一种稳定的硅原子。
- Aluminium can be transformed, by the capture of an alpha particle and the emission of a proton, into a stable silicon atom. 铝可以通过俘获。 粒子、排出质子而被蜕变成一种稳定的硅原子。
- measurement of gross alpha activity in non-saline water (thick source method) 在不含盐的水中总峄疃炔饬: 厚源法
- The nature of the nuclear transformation could be firmly established: the aluminium atom,for example,captures the alpha particle and is transformed,after expelling the proton,into an atom of silicon. 核蜕变的性质因此得到确立。例如,铝原子俘获。粒子,并在排出质子后蜕变成硅原子。
- Method: Phenylalanine was absorbed with particle activated carbon. 方法:采用颗粒活性炭吸附苯丙氨酸。
- The nature of the nuclear transformation could be firmly established: the aluminium atom, for example, captures the alpha particle and is transformed, after expelling the proton, into an atom of silicon. 核蜕变的性质因此得到确立。 例如,铝原子俘获。 粒子,并在排出质子后蜕变成硅原子。
- alpha particle ionization detector α粒子电离检测器
- When we breathe in radon, the alpha particles emitted in the decay process will cause damage to our lung tissue. 氡气在衰变过程中会放出粒子,当我们吸入氡气时,我们的肺部便会受粒子影响。
- Alpha particles are positively charged helium nuclei obtained from natural radioactive decay. 粒子是从天然放射性蜕变得到的带正电的氦核。
- The goods are to be sold by the gross. 这些货物是要趸批出售的。
- Millions of alpha particles went straight through the nitrogen gas without touching any of its atoms. But now and then there came a direct hit on a nitrogen nucleus, which split it. 成百上千万的粒子没有碰到氮原子就穿过了充满氮气的试管,但时不时的总有一些粒子会击中并分裂氮原子。
- Over 25 isotopes of Polonium are known, with atomic masses ranging from 192 to 218. Polonium-210, the predominant isotope of polonium, is radioactive and emits alpha particles on decay. 现时已知道钋元素有25个同位素,它们的质量数由192至218,钋210是当中显著的一个同位素,具放射性特徵,会释出放射性阿尔法粒子。
- Using Charged Particle Activation Analysis (CPAA), the concentration of oxygen in a thin boron target was determined, and the method of analyzing the thin unknown sample in comparison with the thick standard was studied. 应用带电粒子活化分析法(CPAA)对硼薄膜中的氧含量进行了测量,并对利用厚标样分析薄样品中的元素含量的比较测量方法进行了研究。
- He made a gross mistake but refused to admit it. 他犯了严重的错误却不肯承认。
- He regretted very much having said something gross. 他讲了一些粗话,对此非常後悔。
- The gross for the year was $60,000. 年总收入为六万美元。
- The researches are concerned with alpha rays. 这些研究是关于阿尔法射线的。
- The office has been humming with activity. 办公室一直忙着搞活动。
- There wasn't a particle of truth in what he said. 他说的没有一点真话。
- The threat of war has depressed business activity. 战争的威胁使经济萧条。