Then a wind sprang up from nowhere.

突然，不知从哪儿刮来了一阵风。

First, the snow stopped. Then a wind sprang up and it became freezing cold.

先是雪停了，接着突然刮起一阵风，冷得要命。

The air grew cold and a wind sprang up, tossing the machine uncomfortably.

空气越来越冷， 一阵风吹来， 机器难受地翻腾着。

He first justifies his presence and tells the Trojans that the Greeks were going  to sacrifice him to get a favorable wind to return home and that he had escaped as winds sprung  up before the ceremony took place.

他首先证明自己的存在是正当的，并告诉特洛伊人，希腊人将牺牲他来换取顺风返回家园，而他在仪式举行前因刮风而逃脱了。