There is a great deal of unmapped country within us which would have to be taken into account in an explanation of our gusts and storms.

The answer, my friend, is blowin' in the wind.

幸福的关键是感恩。

采矿业必须发展以满足不断变化的世界的需求。

求学的最大益处，在于自我追求改变气质。