for an old song

• adv. 非常便宜地(廉价地)

for an old song的用法和样例：

例句

用作副词 (adv.)

1. It was easy to train a soldier to use a musket, and hence they combined the power of gunpowder with the ability to raise an army cheaply.
   训练一名士兵成为一名持枪步兵是挺容易的，所以能够比较便宜地招募军队。