南风

There is a strong south wind.

有一股强大的。

All of a sudden,a southeasterly wind sprang up and the sky was overcast.

然刮起东来,一间天上布满了乌云。

As the plane exited the storm into the prevailing southwesterlies, there was a rapid increase in both the head wind and updraught.

其后航机飞出暴雨区进入盛行西带，逆和上升气流均迅速加强。