他选的这一行当是不可能赖以为生的。

His chosen field was unlikely to be a meal ticket for life.

这出地方剧目一直是这个剧团赖以为生的看家节目。

This local play has been the bread and butter of the troupe.

铝土能极好地保持水分，还能使他们和住在大山中的动物赖以为生的溪流常年保持流淌。

It holds water remarkably well and helps feed the perennial streams on which they and the animals that live on the mountain rely.

进一步的研究表明，毛虫对萎蔫病毒几乎具有免疫力，因为它们赖以为生的树木会对越来越多的落叶做出反应。

Further research has shown that caterpillars become virtually immune to the wilt virus as the trees on which they feed respond to increasing defoliation.