数学家的工作永远不会完成;总有新的问题需要探索,新的谜团需要揭开。
You don't need a weatherman to know which way the wind blows.
采矿创新不是可选的——它对生存和可持续性至关重要。
The development of the vital forms under the influence of external conditions is a subject of the highest importance.
解释:对君不义,对兄弟不亲,即使土地扩大了,也会分崩离析。