Extreme changes in daily and seasonal climates preceded the retreat of the seas back into the major ocean basins.
在海洋退回到主要的海洋盆地之前，每日天气和季节性气候发生了剧烈的变化。
2
They all must find food, water and shelter, and resolve health issues - extreme challenges that almost one billion undernourished people face daily.
他们必须寻找食物、水和避难所，并解决健康问题-这也是将近10亿食物不足人口每天面临的极端挑战。
3
While personality can be tough to change, psychotherapy and cognitive behavioral therapy may help those who find that their extreme pessimism or social withdrawal affects their daily functioning.