The sediment was dated based on the ratio of two nuclides.

根据种核素的比例确定了沉积物的年代。

These particles react with minerals in rocks to produce radioactive nuclides, a class of atoms.

些粒子与岩石中的矿物质发生反应，产生性核素，是一种原子。

It adds that the existing treated wastewater still contains other radionuclides and needs to be further purified.

报告还称，现有经过处理的污水中仍含有其性核素，需进一步净化处理。

This is possible because the two nuclides break down at different rates, through the process of radioactive decay.

是可能的，因种核素在性衰变过程中以不同的速率分解。

Miescher found a substance he didn't recognize and called it nuclein (because it resided in the nuclei of cells).

米歇尔发现了一种不认识的物质，给取名核素（因寄居在细胞核里）。

It's uncertain whether the ALPS can remove tritium, carbon-14 and other radionuclides effectively based on past experience, Deng said.

邓说，根据过去的经验，ALPS 能否有效去除氚、碳-14 和其性核素还不确定。

A water treatment system removes radionuclides and reduces radioactivity.

水处理系统去除性核素并降低性。

But that date has been overthrown by work employing cosmogenic nuclide dating.

但该日期已被采用宇宙成因核素测年的工作推翻。

It still contains a potentially harmful radionuclide called tritium.

仍然含有一种潜在有害的性核素，称氚。

Her MUGA had an ejection fraction of 19% with no focal wall motion abnormalities.

性核素活动血管扫描结果提示血分数19％无局部心室壁运动异常。

A radionuclide cystogram uses a similar procedure as the VCUG, except that it uses a radioactive tracer injected into a blood vessel.

性核素膀胱显像和VCUG的过程相似，只不过需要静注性示踪剂。

Every time a nuclear weapon goes off - which happens more often than you think - it spreads radionuclides.

每次核武器爆炸——种情况比你想象的更频繁——会传播性核素。

It is possible that the composition of the radionuclides are proving more dangerous to the Fukushima birds than they are to the birds near Chernobyl.

也许是因福岛的性核素成分对鸟类更危险。

The offshore discharge of ALPS-treated water is an issue that cannot be postponed in order to advance the decommissioning of the plant and the reconstruction of Fukushima.

了推进核电站的退役和福岛的重建，向近海排经过多核素去除设备处理的水不能推迟。

To test that idea, they directly dated the cave breccias in Members 2 and 4 using cosmogenic nuclide dating, which Dr Granger helped develop.

了验证个想法，们使用格兰杰博士帮助开发的宇宙成因核素测年法，直接对成员 2 和成员 4 中的洞穴角砾岩进行了测年。

A sophisticated dating technique, called cosmogenic nuclide dating, has upended previous estimates—and, with that, is rewriting an important chapter in the story of human evolution.

一种称宇宙成因核素测年的复杂测年技术推翻了之前的估计，并由此改写了人类进化史的重要篇章。

Melted nuclear fuel debris inside the damaged reactors is being cooled by pumped-in water, which comes into contact with a toxic cocktail of radioactive substances known as radionuclides.

受损反应堆内的熔化核燃料残渣通过注入的水进行冷却，些水与一系列有毒的性物质（即性核素）接触。

Tepco said for years that its purification system would reduce 62 radionuclides to safe or non-detectable levels and that only traces of tritium, a radioactive form of hydrogen, and two other isotopes would remain.

多年来，Tepco声称其净化系统将把62种性核素降低到安全或不可检测的水平，只会残留微量的氚（一种性氢同位素）和其种同位素。

When a breccia-forming object falls into a cave, it finds itself shielded from cosmic rays, and the steady decay of its existing cosmogenic nuclides can be used to determine how long ago it fell in.

当形成角砾岩的物体落入洞穴时， 发现自己免受宇宙线的影响， 并且其现有的宇宙成因核素的稳定衰变可以用来确定落入洞穴的时间。