used to refer to a group of people that is the second of several groups to do something, or to the second part of a situation or an event

Many second-wave feminists wrote very seriously about motherhood. 许多第二波女权主义者非常认真地写了关于母性的文章。

If we have a second-wave recession, it will be catastrophic for the country. 如果出现第二波经济衰退，这对国家来说将是灾难性的。