当然，父亲会经常供给一些零钱，但是叔叔和婶婶也总是额外收入的源泉。 Father, of course, provides a regular supply of pocket-money, but uncles and aunts are always a source of extra income.
可消费的源泉 An expendable source.
丰富的想象力；新思想的丰富源泉 A fertile imagination; a fertile source of new ideas.
华兹华斯从风景优美的英格兰湖区获得灵感。那地方是他灵感的巨大源泉。 Wordsworth found (his) inspiration in/drew (his) inspiration from the Lake District scenery. It was a great source of inspiration to him.