翻译和例句:
it is fully filled with helium (氦) gas.At high altitude, the temperature may drop down to 70 degrees ……
) intohelium(氦). Scientists think that in about 4.5 billion years, the sun will run out of hydrogen ……
the cost of space travel.---------------------------------------credit 信用helium-3 isotope 氦3同位 ……
will be wrong.''---------------------------------------migration 移民isotope 同位素Helium 氦(化学元素,符号为He)radioactive ……
;Scientists want to directly observe how the universe went from hydrogen (氢) and helium (氦) to stars... the universe went from hydrogen (氢) and helium (氦) to stars and galaxies, as well as planets ……
with nitrogen (氮) molecules.●Blue and purple: Hydrogen (氢) and helium (氦) molecules contribute... to distinguish against the dark night sky.●Blue and purple: Hydrogen (氢) and helium (氦) molecules contribute ……
the decorating the day before. Helium (氦) balloons can be bought in advance.■ Upcoming children ……
the decorating the day before. Helium (氦) balloons can be bought in advance.■ Upcoming children ……
努力 foresee 预见 futurist 未来主义者 slot 狭槽 transit 运输blur 模糊不清 convey 搬运 foe 敌人 helium 氦 hologram 全息 ……
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