另外，螺旋流在自然界也是十分常见的，如龙卷风。
On the other hand, swirling flow can be seen frequently in nature, such as tornado.
屋子顶上的黑雾，已和之前有所不同，变成了一如龙卷风的模样。
The house takes over of black fog, have a dissimilarity already and before, become just as the shape of tornado.
自然灾害，如洪水，热带气旋，龙卷风和潮汐孔，几乎每年都发生在这里-同时带来不幸的后果。
Natural calamities, such as floods, tropical cyclones, tornadoes and tidal bores occur here almost every year - with tragic results.
应用推荐