气候的变化不是一朝一夕的原因，而是逐渐积累的结果。

如果货币政策不以时间一致的方式进行，可能会产生不稳定。

But the old man thought only of his steering and his great tiredness. He had gone out too far and the sharks had beaten him. He knew they would leave him nothing but the stripped skeleton of his great catch.

要学会控制投资风险，使用适当的风险管理工具。