prequisite
1. Recicled provides a prequisite for the sustainable development of human beings.
循环为人类的可持续发展提供必备的资源数量。
2. Eric: Whenever I see a girl and wants to develop a romance with her, I would give a thought to her sign.But it is not a prequisite for not going out with her.
见到一个女生,如果想发展,会想想她的星座,但不会因为她的星座而不和她在一起。