单词
helium
读音
ˈhiːliəm
美式 ˈhiːliəm
英式 ˈhiːliəm
词根
无
释义
["n. [化学] 氦（符号为He，2号元素）"]
例句
Helium is a very light gas.
氦是一种很轻的气体。
Atoms of hydrogen are fused to make helium.
氢原子可熔合成氦。
Helium is a gas used in balloons.
氦是一种用于气球的气体。
Helium, in turn, can fuse together to form heavier elements, such as carbon
Formed when the cosmos was filled with hydrogen and helium gases, they initially contained virtually no heavy elements
Helium is a very light gas.
氦是一种很轻的气体。
Atoms of hydrogen are fused to make helium.
氢原子可熔合成氦。
Helium is a gas used in balloons.
氦是一种用于气球的气体。
Helium, in turn, can fuse together to form heavier elements, such as carbon
Formed when the cosmos was filled with hydrogen and helium gases, they initially contained virtually no heavy elements
强化记忆
无
看视频学发音
That’s where you get what stars are actually made of.Like, helium, and the helium and hydrogen,and beryllium and even iron and nickel.
Hydrogen has one proton,helium, two protons,lithium, three protons,
which are relatively small,burn hydrogen into helium,but heavier stars of about eight times the mass of the sun
fusion transforms hydrogen into heavier elements:helium, carbon, and oxygen,burning subsequent elements faster and faster to reach iron and nickel.
In the 1950s, people were trying to figure outhow superfluid helium worked.There was a theory.
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