4周搞定2000+托福核心词
isotopic = iso(等，同) + top(位置) + ic(…的) = 同位素的
isotopic = iso(等，同) + top(位置) + ic(…的) = 同位素的
等同的位置→同位素
isotope
常考释义
Helium-3 is an isotope of helium that has tremendous potential for use in practical energy applications.
氦3是一种氦气的同位素，它在实际的能源应用上有巨大的潜力。
来源于：听力OFFICIAL36 L1n. 同位素
Changes of nuclear mass and nuclear size cause isotope shifts.
原子核质量和大小的不同引起同位素移动.
Helium-3 is an isotope of helium that has tremendous potential for use in practical energy applications.
氦3是一种氦气的同位素，它在实际的能源应用上有巨大的潜力。
来源于：听力OFFICIAL36 L2Remember, an isotope is a form of a chemical element that has the same number of protons in its atomic nucleus but a different number of neutrons.
记得吗，同位素是化学元素的多种形式之一，它和其他元素有相同的质子数，但有不同的中子数。
来源于：听力OFFICIAL36 L2The most common isotope of helium on Earth is helium-4, which does not have any known or potential uses as an energy source.
最常见的氦气的同位素是氦4，氦4目前我们并不知道它有什么可以用作能源来源的潜力。
来源于：听力OFFICIAL36 L2These shells differ in their proportion of ordinary oxygen (oxygen- and the heavy oxygen isotope (oxygen-.
这些壳的普通氧（氧16）和重氧同位素（氧18）的比例不同。
来源于：阅读OFFICIAL19 P3The oxygen isotope ratio of the ocean changes as a great deal of water is withdrawn from it by evaporation and is precipitated as snow to form glacial ice.
当大量水被蒸发并以雪的形式沉积形成冰川冰时，海洋中氧的同位素比率会发生变化。
来源于：阅读OFFICIAL19 P3Thus, more of the heavy isotope is left behind in the ocean and absorbed by marine organisms.
这样，更多的重氧同位素留在了海洋里并被有机物吸收。
来源于：阅读OFFICIAL19 P3以上图片仅供学习交流使用，版权归原作者所有，如有侵权，请与我方联系
