Tritium is one of the mildest radioactive isotopes.氚是最和缓的放射性同位素之一.More reactive are the heavier isotopes of hydrogen, deuterium and tritium.更为活跃的是氢的较重同位素, 氘和氚.Tritium has a half - life of 12.4 years.氚的半衰期为12.4年,地球形成时的氚早已...
...tritium, a radioactive isotope of hydrogen.氢的放射性同位素氚Tritium has a half - life of 12.4 years.氚的半衰期为12.4年,地球形成时的氚早已不存在.The Energy Secretary hopes to bring on line a safer new tritium production reactor...能源大臣希望能投产一座更安全的...