大多数人似乎认为汽车是必需品，而不是奢侈品。

Most people seem to consider a car a ___necessity, not a luxury.

手机最初作为全球通信的必需品出现。

Mobile phones first appeared as a ___necessity in worldwide communications.

获得教育是社会发展的基本必需品。

Access to education is a fundamental ___necessity for societal development.