Yet the same financiers who preached the necessityof free markets on the way up have since depended on taxpayers to save their industry at a cost of trillions of dollars.
Although some may challenge the necessityof a new language, another way to view languages is as a set of tools that can be used to solve problems.
尽管一些人可能会质疑新语言的必要性,但是应该把语言看作可以用来解决问题的工具集。
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There is an old English saying, "Necessity is the mother of invention," which means that when you are faced with a need you will discover some way of fulfilling it.