It has several meanings. One meaning is that a person who never settles down in one place will not be successful.

VOA: special.2009.06.21

Well never mind, we will give it to Jude. We know Jude's going to be here.

算了,就给裘德吧,他下周肯定来

耶鲁公开课 - 博弈论课程节选

When democracy is invented it will have its moment and it will spread, and there will be numerous democracies but they will never be the majority of the poleis.

当民主的理念提出以后,它会不断的蔓延,会有很多民主制国家,应运而生,然而大多数的城邦却不是民主的

耶鲁公开课 - 古希腊历史简介课程节选

"It never will be." Hen-Tov says Iranian leaders are perplexed - even envious - that a country that was half as rich as Iran was years 30 ago, when the Islamic Revolution took place, is today twice as wealthy as Iran.

VOA: standard.2010.07.26