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[核]放射性物质
1、chemical substance───化学物质
2、harmful substance───[环境]有害物质
3、substance───n.物质；实质；资产；主旨
4、radioactive decay───[核]放射性衰变；放射衰变
5、substance P───P物质；肽物质（即神经传递介质）
6、substance share───物质份额
7、spilled substance───溢出物质
8、declarable substance───申报物质
9、intercellular substance───[组织]细胞间质；细胞间质，胞间物质
1、The United Nations agency says they do not protect against external radiation, or against any other radioactive substance.───这个LianHeGuo机构表示，这些药片不能防止外部辐射，也不能抵御任何其他的放射性物质。
2、Japanese health officials found abnormal amounts of a radioactive substance in spinach and milk grown in areas near the plant.───日本卫生官员发现，福岛第一核电站附近区域菠菜和牛奶中的放射性物质含量超标。
3、The original plan was to encase a small amount of a radioactive substance in a protective steel container.───原先计划是要将少量的放射性物质封存在一个钢质防护罩中。
4、no other new radioactive substance have such positive results been obtained.───其他任何一种新的放射性物质尚未取得如此积极的结果。
5、After 15 minutes of listening, scientists injected participants with a radioactive substance that binds to dopamine receptors.───在15分钟的音乐体验后，科学家为参加者注射能依附多巴胺感受器的放射性物质。
6、If most of their dopamine receptors were free, on the other hand, the radioactive substance would bind to them.───从另一方面来说，如果大多数的巴多胺感受器处于空闲，那么放射性物质将会继续依附其上。
7、The wife of a Russian spy who was poisoned with a radioactive substance is now tested positive for it.───俄罗斯特工威克多·利特维年科因放射性物质中毒，现在其妻放射性物质测试显阳性。
8、Alexander Litvinenko died Thursday from a fatal dose of a radioactive substance.───（体力含有）致命剂量放射性物质的利特维年科在星期4死亡。
9、A former KGB agent who died from poisoning reportedly had a radioactive substance in his body.───中毒身亡的QianSuLianGuoJiaAnQuan委员会（克格勃）特工被报道体内有放射性的物质。
1、They've been injected with plutonium in an effort to find out exactly how the radioactive substance affects people.
2、The activity of a radioactive substance is the number of nuclei decaying per second.
3、It is suitable for using as material to be deformed frequently and as shielding material for person who is engaged in development and application of radioactive substance.
4、A half-life is the time it takes half the atoms of a radioactive substance to disintegrate.
5、The half-life of a radioactive substance is the time interval taken for the radiant species present to lose half its radioactivity.
6、The original plan was to encase a small amount of a radioactive substance in a protective steel container.
7、The natural radioactive substance content was determined for fishes, in thermal spring water, farm products irrigated with such water and other biological samples.