Nuclear weapon e fole: o que têm em comum

1. Passo 1. Nuclear weapon — funciona como — Nuclear reactor. The same physics: a controlled and an uncontrolled chain reaction.
2. Passo 2. Nuclear reactor — faz parte de — Nuclear submarine. A reactor.
3. Passo 3. Nuclear submarine — evoluiu de — Submarine. Nuclear power let submarines stay submerged for months.
4. Passo 4. Submarine — é feito de — Leather. It was covered with leather.
5. Passo 5. Leather — é material para — Fole. Bellows are a leather bag.

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