The disease is thought to have originated in the tropics.

这种疾病据说起源于热带地区。

《牛津词典》

The leg action of the breaststroke may have originated by imitating the swimming action of frogs.

蛙泳的腿部动作可能是模仿青蛙的游泳动作而来。

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It is believed to have originated in South America in the early 1900s, and later spread to Europe before crossing over to sub-Saharan Africa.

它被认为是在20世纪初起源于南美洲，后来传播到欧洲，然后跨越到撒哈拉以南的非洲。

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The weapons they used were also thought to have originated in Libya, the security official said.

WSJ: Libya Boosts Oil-Field Security

Many of the neutrinos around today are thought to have originated in the big bang.

ENGADGET: NOvA neutrino detector captures cosmic rays in 3D, aims to unlock the mysteries of the universe

" When asked where the story may have originated, he said, "I've got my suspicions.

CNN: Bush acknowledges 1976 DUI charge