the number of ways that 2 lightbulbs can be chosthe number of ways that 2 lightbulbs can bechosen这句话的意思,求翻译

问题描述:

the number of ways that 2 lightbulbs can be chos
the number of ways that 2 lightbulbs can be
chosen
这句话的意思,求翻译

选择这两粒灯泡的方式有很多种.