局势风云突变，战争一触即发。

A hair-trigger situation has been created which could lead to an outbreak of war at any time.

2007年，美国经济这艘巨轮的航程开始风云突变。

In 2007, the great ship of the American economy began encountering darkening skies.

风云突变的商海中，大多数美国人认为谦虚就是软弱的标志。

Most Americans in the fast business world consider humility a sign of weakness.

天空刚开还是阳关照耀，现在却有暴风雨。天空就是这样风云突变，变幻莫测。生活也是这样，时好时坏谁都无从知道。

Thee sky just opened or sunlight shine on, now have a storm. The sky is so fast-changing and unpredictable. Life is such a good bad who did not know.