大火从电梯通道里开始，然后蔓延到了屋顶。

The fire began in a lift shaft and spread to the roof.

《柯林斯英汉双解大词典》

目击者说，脚手架开始起火，然后火焰蔓延到整幢建筑。

Witnesses said a scaffolding caught fire, and flames then spread to the building.

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然后他们又说，希腊的问题不会向其他国家蔓延，它却如期蔓延了；

Then they said that Greek problems would not spread to other countries. They duly did.

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然后他们又说，希腊的问题不会向其他国家蔓延，它却如期蔓延了；

Then they said that Greek problems would not spread to other countries. They duly did.

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