河南南阳的艾草种植、采收、加工、销售产业链带动当地农民脱贫致富，这种多年来当地居民司空见惯的野草现在成了他们的现金奶牛。请看本报周五的报道：

For many years, mugwort was nothing but wild grass to locals in central China’s Henan Province. People rarely thought of it except at the Dragon Boat Festival, when they hang bundles of it on the front door as a tradition.

Today, with a complete industrial chain covering growing, processing and sales, mugwort has become a cash cow that has lifted villagers out of poverty and is leading them to prosperity.

Formerly impoverished villager Cui Tinggui in the rural area of Nanyang cannot work in big cities as he has his ailing mother to take care of at home. By growing mugwort, he can earn 2,000 yuan (US$311) per mu (about 0.07 hectares) of the plant every year.

报道中的cash cow就是“现金奶牛”，指可以带来稳定利润的产品或者生意。例如：

This product has always been a cash cow for our company.

这种产品一直是我们公司的现金奶牛。