同位素

Seventy of the 350 naturally occurring isotope s are radioactive.

自然界有350种天然同位素，其中70种有放射性。

Put radioactive isotope ~(131)I in boreholes and mark the karst water evenly.

在钻孔中用放射性同位素~(131)I均匀标记地下水。

Most immunoconjugates have been designed to carry a radioactive isotope (radio-immunoconjugates) or a toxin .

大多数免疫交联物被设计用来携带放射性同位素或免疫毒性物质。

Because a radioactive form of argon is produced by decay of a naturally occurring radioactive potassium isotope, it can be used to date rocks and samples more than 100,000 years old.

因为它是稀有天然放射性同位素钾衰变而产生的，所以可以用来测定十万年以上的岩石年龄和采样。属类：-〖化学

Foreman: Now, I'm injecting a material that's tagged with a radioactive isotope. It's gonna enter your spine and travel up to your brain. It'll make you able to think deep thoughts, at about 100 miles per hour.

福尔曼：我现在要给你注射一些混合了放射性同位素的物质，它将通过你的脊髓进入你的大脑，把你带入深度思考状态，大约每是小时推进100英里的速度。

Much consideration has however been given to the possibility that some atoms present in food might be converted to radioactive isotope s by the radiation.

人们更多考虑的是这样一种可能性，即食物中存在的一些原子经过辐照可能会转化为放射性同位素。

As a tracing agent , the radioactive isotope has a high sensitivity for detection.

放射性同位素作为示踪剂，其检测灵敏度高，在染色和盐类示踪剂不能奏效的情况下，放射性示踪剂都能得到成功。

The article introduces recently some radioactive source accidents in China, and analyses the reasons of the accidents. Some important issues existed in the process of implementing new regulation were summarized, and some suggestions for managing radioactive sources are made.

本文通过介绍我国发生的一些放射源事故情况，分析事故发生的原因，总结了《放射性同位素与射线装置安全和防护条例》颁布后在实施过程中还存在的一些关键问题，提出了加强放射源管理的对策与建议。

The γ-ray source is radioactive isotope of 241 Am which has the emission energy 59.5keV.

射线源为同位素241Am，它发出的光子能量是59.5keV。

Indeed the use of an electron beam or X-rays for irradiation overcomes the need for a radioactive source altogether.

用电子束或X-射线进行辐照确实完全解除了对某种放射源的需要。这个象炼狱般的地方将一缕致死的放射性同位素喷入大气层。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。