4周搞定2000+托福核心词
aluminum = alumin(铝) + ium(元素) = 铝元素→铝
deuterium = deuter(二) + ium(元素) = 比氢重两倍的金属→重氢
因太阳光谱而发明的元素→氦
helium
常考释义
Deuterons readily combine with additional protons to form helium.
氘核很容易与其他的质子结合形成氦。
来源于：阅读OFFICIAL50 P3n. 氦（化学元素）【化】
Helium is a gas used in balloons.
氦是一种用于气球的气体。
Deuterons readily combine with additional protons to form helium.
氘核很容易与其他的质子结合形成氦。
来源于：阅读OFFICIAL50 P3Helium, in turn, can fuse together to form heavier elements, such as carbon.
氦，又会融合在一起形成更重的元素，比如碳。
来源于：阅读OFFICIAL50 P3Formed when the cosmos was filled with hydrogen and helium gases, they initially contained virtually no heavy elements.
这些恒星是在宇宙充满氢气和氦气的情况下形成的，它们最初几乎不含重元素。
来源于：阅读OFFICIAL50 P3Though Population I stars consist mostly of hydrogen and helium gas, they also contain heavy elements (heavier than helium), which comprise about 1 or 2 percent of their mass.
虽然星族I的恒星的组成物质大部分是氢气和氦气，它们也含有重元素（比氦更重），这些重元素约占其质量的1或2%。
来源于：阅读OFFICIAL50 P3The Jovian planets, on the other hand, contain a large percentage of the gases hydrogen and helium, with varying amounts of ices: mostly water, ammonia, and methane ices.
而类木行星恰恰相反，包含较大比例的气态氢和氦，以及各种形态的冰（大部分是水、氨和甲烷冰）。
来源于：阅读OFFICIAL16 P3The Jovian planets have very thick atmospheres consisting of varying amounts of hydrogen, helium, methane, and ammonia.
类木行星有非常致密的大气层，主要由变化量的氢、氦、甲烷和氨组成。
来源于：阅读OFFICIAL16 P3Ramsay then studied a gas that was present in natural gas deposits and discovered that it was helium, an element whose presence in the Sun had been noted earlier in the spectrum of sunlight but that had not previously been known on Earth.
拉姆齐经过研究又发现了另一种存在于自然界中的气体元素——氦，该元素在太阳中存在，并且很早就被发现存在于太阳光谱中，但是之前并没有在地球上找到过。
来源于：阅读OFFICIAL16 P2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
