Necessity is the mother of invention.

例句：

1. 1. The decision to buy a new car was made out of necessity.
   出于必要，决定购买一辆新车。
2. 2. The lack of resources is a major necessity for survival.
   资源缺乏是生存的主要必要条件。
3. 3.The company's survival depends on its ability to adapt to the changing market necessities.
   公司的存续取决于其适应不断变化的市场需要的能力。