...tritium, a radioactive isotope of hydrogen.氢的放射性同位素氚Tritium is one of the mildest radioactive isotopes.氚是最和缓的放射性同位素之一.chemically inert radioactive waste不易发生化学反应的放射性废弃物People should keep away from the radioactive waste...
The waste is safely locked away until it is no longer radioactive.废料被安全储存起来，直到其不再有辐射性。Wine is radioactive but few people stop drinking it on that account.酒是有放射性的，可是很少有人因此而戒酒。They were exposed to radioactive fallout durin...