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...
Normally, the transportation system in Paris carries 950,000 passengers a day.正常情况下，巴黎的交通系统每天运送95万乘客。The Guardian's front page carries a photograph of the two foreign ministers.《卫报》的头版刊登了两国外交部长的一张合影。A thin cable car...
The new tax law equalizes the tax rate for foreign - financed companies with Chinese businesses at 25 percent.新的企业所得税法将向外国公司征收与中国公司相同的25%税率.Isothermal Block . The thermally conductive block that equalizes the temperature...