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- Standard theory predicts that two neutrinos are produced for every fusion of four protons into a helium nucleus. 标准理论预言,在由四个质子变成一个氦核的每一次聚变过程中要产生两个中微子。
- To take place. In this reaction, three helium nuclei will fuse together to form a carbon nucleus. 为止,即把三颗氦原子核结合为一颗碳原子核。
- Similar to other main sequence stars, hydrogen nuclei will be fused to helium nuclei in the core. 和其他恒星一样,大质量恒星会在主序阶段把氢转化为氦。
- A particles, identical to helium nuclei, are positively charged particles consisting of two protons and two neutrons. 粒子带正电荷,由两粒带正电荷的质子和两粒中性的中子组成,相等于一个氦原子核。
- 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 core meanwhile will reach a temperature of100 million degrees Kelvin, and the helium nuclei will begin fusing into carbon nuclei. 在此期间核心温度会达到1亿K,氦原子核将开始聚变成碳原子核。
- So, Hoyle reasoned, there must be an atomic resonance of carbon that is almost exactly equal to the combined mass of three helium nuclei. 通过反复的测量,他们得出结论,太空中的尘云里就含有大量的钻石尘埃。
- The core meanwhile will reach a temperature of 100 million degrees Kelvin, and the helium nuclei will begin fusing into carbon nuclei. 在此期间核心温度会达到1亿K,氦原子核将开始聚变成碳原子核。
- The cosmic rays are mainly made up of high energy protons, plus some helium nuclei and heavy charged particles and ions, with atomic number equal to or greater than 3. 宇宙射线的主要成份是高能量的质子,其次是氦原子核及少量原子序数3或以上的重粒子和离子。
- The fortress was the nucleus of the ancient city. 这城堡是这座古城的中心。
- The protoplasm outside the nucleus of a cell. 细胞质,细胞浆细胞分子外部的细胞质
- The deuteron can fuse with another proton to make a helium 3 nucleus. 氘核可以和另一个质子聚合以生成一个氦3核。
- These 1000 books will form the nucleus of the new school library. 这一千本书将构成学校新图书馆藏书的基础。
- Helium and neon are inert gases. 氦和氖为惰性气体。
- The atomic center is the nucleus, and the electronics winds revolve it. 原子的中央是原子核,电子绕着它旋转。
- A proton or a neutron, especially as part of an atomic nucleus. 核子质子或中心,尤指作为原子核的一个组成部分
- The antimatter equivalent of helium. 反氦与氦等价的反物质
- The colorless, liquid component of the cell nucleus. 细胞核液细胞核中无色的液体成分
- Helium was discovered on the sun. 氦是在太阳上发现的。
- Most big balloons are now filled with helium. 现在许多大气球中充的是氦气。