But for many millions of people the devastation caused by changing seasonal patterns and unpredictable weather is already a clear and present danger.

而对于数百万民众来说，由不断变化的季节模式和变化莫测的天气导致的破坏已经是迫在眉睫的危机。

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Environmental stochasticity, This is a nondeterministic, unpredictable variation in the environmental conditions, resulting in a changing equilibrium density.

环境随机变化。环境条件非确定性的、不可预见性的变化会导致平衡密度的变化。

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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.

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。

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The reality is that students will work in a world of business that is fast-changing, global and often unpredictable.

FORBES: Teaching Business In A Time Of Crisis

The problem is that those needs are changing almost as quickly as they can be expressed, and in unpredictable ways.

WSJ: The Library's Future Is Not an Open Book | By Julie V. Iovine | Public Library Renovation