“做女服务生”可以表达为 “work as a waitress” 或 “be a waitress”。
“work as a waitress” 强调从事女服务生这一职业或工作行为。
“be a waitress” 侧重于描述某人的职业身份是女服务生。
例如：
She decided to work as a waitress to earn some extra money during her summer vacation.（她决定在暑假期间做女服务生来赚些外快。）
She has always dreamed of being a waitress in a fancy restaurant.（她一直梦想着在一家高档餐厅当女服务生。）