Frontal thunderstorm over the field, up and down drafts up to40 knots.

锋面雷雨过境，上升下降气流达40海里每秒。

youdao

Frontal thunderstorm over the field, up and down drafts up to40 knots.

锋面雷雨过境，上升下降气流达40海里每秒。

youdao