放射性的

Short-lived radionuclides and long-lived isotope systems are normally used to date chondrites; the former systems can provide only relative ages while the later can provide absolute formation ages of chondrules, in contrast.

陨石年代学研究中常用定年工具包括短半衰期和长半衰期放射性同位素体系，其中前者可以给出陨石形成的相对年龄，而后者则可以给出绝对形成年龄。

In 1898, the Curies obtained a new element, whose radioactivity was several million times stronger than that of uranium.

1898年，居里夫妇获得了一种新元素，它的放射性比铀强几年居里夫妇获得了一种新元素，百万倍。

Periodic Table Ⅵ B family silver-white metallic luster of the solid metal transition element, atomic number Z = 74, atomic weight of 18385, chemical symbol W, there are five kinds of natural F stable isotopes, 18174W, 18274W, 18374W, 18474W, 18574W and eight kinds of radioisotopes .

周期表中ⅥB族银白色金属光泽的固体金属过渡元素，原子序数Z＝74，原子量18385，化学符号W，有五种自然F 稳定同位素，18174W、18274W、18374W、18474W、18574W和八种放射性同位素。

Main mineral resources are tungsten, tin, bismuth, molybdenum, copper, iron, tantalum, niobium, lead, zinc, gold, cobalt soil, Beryl, Ying Dan, K-feldspar, quartz stone, marble, crystal stone, kaolin, etc. 48 Species, groundwater resources of the main hot water mineral water, hot spring spa resort with 13, Chung, about 1,400 cubic meters, the highest temperature of 70 degrees Celsius, with weak radioactive radon and useful elements of the human body, there are important medical value .

矿产资源主要有钨、锡、铋、钼、铜、铁、钽、铌、铅、锌、黄金、钴土、绿柱石、莹石、钾长石、石英石、大理石、水晶石、高岭土等48种；地下水资源主要有热水各矿泉水，温泉风景区热水泉眼有13处，日涌量约1400立方米，水温最高70摄氏度，含弱放射性氡和对人体有益元素，有重要的医疗价值。

Failing to set the radioactive identification, mark or warning statements in Chinese in accordance with the provisions

不按照规定设置放射性标识、标志、中文警示说明的

There are two main types of uses of radioactive isotopes in biochemistry.

在生物化学中，放射性同位素主要有两方面的应用。

The reactor is only one of four in the world that produce medical radioactive isotopes.

该反应堆是世界上仅有的四个生产医用放射性同位素的反应堆之一。

Low rotten bituminous coal (jet coal, it glues coal to be and weak to glue coal), natural radioactive level lower,( 238U: 33.2- 50.0Bq/kg , 232Th: 52.5- 54.4Bq/kg , 226Ra: 30.6- 56.5Bq/kg ), obviously lower than the brown coal than activity, and the uranium , radium which the companion grew is in a basic balance, uranium , thorium are also in a basic balance.

低变质烟煤（包括长焰煤、不粘煤和弱粘煤）天然放射性水平较低，（238U：33.2～50.0Bq/kg、232Th：52.5～54.4Bq/kg、226Ra：30.6～56.5Bq/kg），比活度明显低于褐煤，且伴生的铀、镭基本平衡，铀、钍亦基本平衡。

To wags during the cold war, ground zero was a favoured spot: better to be incinerated in the first mushroom cloud, they joshed, than to wake up to a world of radioactive rubble.

对于冷战期间诙谐幽默的人来说更愿意选择地面零点：他们冷嘲到，在第一个蘑菇云出现时就被烧死总比过后意识到全世界到处都有放射性物质要好。

Radionuclide imaging: In graft side, there were obvious uptakes of the ^99mTc-MDP and revascularization; In control side, there was no process of bone regeneration and bone metabolism.

放射性核素显像：实验侧有较明显的核浓聚和再生血管化现象，对照侧无骨重建，故无骨代谢变化。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。