It is often said that necessity is the mother of invention.
常言道,需要是创造之母。
VOA Special 2015年5月合集
The saying " necessity is the mother of invention" means that when people really need to do something, they will find a way to do it.
“需求是发明之母”这个表达的意思说,当人们真的需要做某件事时,他们就会想出做的办法。
格列佛游记(原版)
No man could more verify the truth of these two maxims, " That nature is very easily satisfied;" and, " That necessity is the mother of invention" .
没有人能更证实这两条格言的真实性,“天性是很容易满足的;”并且,“需要是发明之母”。
英语百科
Necessity is the mother of invention
...let us begin and create in idea a State; and yet a true creator is necessity, which is the mother of our invention.
"Necessity is the mother of invention" is an English-language proverb. It means, roughly, that the primary driving force for most new inventions is a need.