uranium 238造句

例句与造句

1. but this isotope is radioactive and decays about six times faster than does uranium 238, which indicates that the fissile fraction was much higher in the distant past
   但是，铀235是具放射性的，而且衰变的速度比铀238快六倍，表示在古代，这个易分裂同位素的比率，比现在高得多。
2. cowan described, for example, how some of the neutrons released during the fission of uranium 235 were captured by the more abundant uranium 238, which became uranium 239 and, after emitting two electrons, turned into plutonium 239
   例如，柯文描述了某些铀235分裂所释放的中子，如何被含量更多的铀238捕捉而产生铀239，在放射出两个电子后又变成钸239。
3. most of earth's internal heat is generated by four long-lived radioisotopes ? potassium 40, thorium 232, uranium 235 and uranium 238 ? that release energy over billions of years as they decay into stable isotopes
   地球内部的热能主要来自半衰期较长的四种放射性同位素钾40、钍232、铀235与铀238，它们在几十亿年来逐渐衰变成稳定的同位素，同时释放能量。
4. It's difficult to find uranium 238 in a sentence. 用uranium 238造句挺难的