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在英国，官方反对使用核能的半衰期很短。 THE half-life of official opposition to nuclear power in Britain has been very short. | ||
碘-131的半衰期为8天，对人身健康危害相当大。 Iodine-131 has a half-life of eight days and is quite dangerous to human health. | ||
不是，对“水合三氯乙醛”有较高耐药能力的人，它的半衰期仅为4个小时。 No, Chloral Hydrate has a half-life of only 4 hours in people with a high tolerance. | ||
头孢克肟抗菌谱广、半衰期长、交叉耐药性小、用药剂量小、适应症广泛。 Cefixime is characterized by broad spectrum, long half life period, less cross resistance to chemical reagent, small use dosage and wide scope of application. | ||
这座城市面临的最大问题就是处理铯—137，这是一种半衰期为30年的放射性同位素。 The city's challenge, chiefly, is to dispose of cesium-137, a radioactive isotope with a half-life of 30 years. | ||
与放射性一样，故事有一个半衰期-换言之，就是新推荐的故事从首页到被下放的周期。 As with radioactivity, stories have a half-life-in other words a period by which half of newly promoted stories are relegated to a nether page. | ||
作者研究了杀灭菊酯、二氯苯醚菊酯、氯氰菊酯和溴氰菊酯在青菜、小白菜、豇豆三种蔬菜中的残留降解情况，四种农药的降解半衰期为1.4～3.1天； Authors researched the degradation of fenvalerate, permethrin, cypermethrin and deltamethrin in 3 vegetables. The half-life of the degradation of 4 Pyrethroids -1.4~3.1 days. | ||
