常見(jiàn)例句a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands. 一種軟質(zhì)、銀白色、放射性四價(jià)金屬元素,同位素用作核反應(yīng)能源,見(jiàn)于釷礦和獨(dú)居石沙中。a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands 一種軟質(zhì)、銀白色、放射性四價(jià)金屬元素,同位素用作核反應(yīng)能源,見(jiàn)于釷礦和獨(dú)居石沙中 返回 thorite