The white whale of energy, scientists have been hyping the potential of nuclear fusion since, oh, the first hydrogen bomb was dropped over the Marshall Islands in 1952.

能源的大白鲸，自从，噢，第一颗氢弹在1952年被投掷在马绍尔群岛以来，科学家们一直都在大肆宣传核聚变的潜力。

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Acting alone, gravity would cause stars to collapse completely, but as long as energy is produced at their centers by nuclear fusion (the joining of atomic nuclei to form new elements, as in a hydrogen bomb), the star is heated and puffed up.

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