And it's not just a lot of people, it's a really diverse group, people from a wide range of ages, from 18 to late 80s, a wide range of incomes, education levels, people who are married, divorced, widowed, etc.
不但人数众多，而且分布广泛， 志愿者分布在不同的年龄层，从18岁到80岁， 不同的收入阶层，教育层次， 已婚的，离婚的，丧偶的，等等。