An H-bomb is a hydrogen bomb: a nuclear weapon far more powerful than the older atomic bomb (the A-bomb). The H is for hydrogen. The bomb gets its huge energy from joining hydrogen nuclei together, which is the same kind of reaction that makes the sun shine.

An H-bomb is a hydrogen bomb H-bomb 就是氫彈：a nuclear weapon一種核子武器，than the older atomic bomb (the A-bomb)比早期的原子彈（A-bomb） far more powerful威力大得多。The H這個 H is for hydrogen代表 hydrogen（氫）。The bomb這種炸彈 from joining hydrogen nuclei together從把氫原子核接合在一起 gets its huge energy得到它巨大的能量，which is這是 that makes the sun shine跟讓太陽發光 the same kind of reaction同一類的反應。

People say H-bomb in news, history, and everyday talk; scientists more often say hydrogen bomb or thermonuclear weapon. It is a heavy, frightening word, used about war and the Cold War.

People一般人 in news, history, and everyday talk在新聞、歷史和日常談話裡 say H-bomb說 H-bomb；scientists科學家 more often更常 say hydrogen bomb or thermonuclear weapon說 hydrogen bomb 或 thermonuclear weapon。It is這是 a heavy, frightening word一個沉重、嚇人的字，used about war and the Cold War用在戰爭和冷戰上。

Though actually the first hydrogen bombs still needed an atomic bomb inside them to start the hydrogen reaction — so H-bomb is the popular name, not a totally separate invention.

Though actually不過老實說，the first hydrogen bombs最早的幾顆氫彈 inside them裡面 still needed an atomic bomb還是需要一顆原子彈 to start the hydrogen reaction來啟動氫的反應——so所以 H-bomb is H-bomb 是 the popular name通俗的叫法，not a totally separate invention不是一項完全分開的發明。