The famous singer once earned a living by singing in nightclubs.

这位着名的歌手曾在夜总会唱歌谋生。

They try to earn a living by selling waste materials, making building materials, or selling products on the streets.

他们试图通过卖废旧材料、制作建筑材料或在街上卖产品来谋生。

The film is about a man who earns a living by appearing in the audience of television shows, but he does not make very much money.

这部电影讲述了一个男人通过当电视节目观众挣钱的故事，但是他钱挣得并不多。