我正在学习Ruby,在我使用的书中,有一个这样的示例代码
#...
restaurant = Restaurant.new
restaurant.name = "Mediterrano"
restaurant.description = <<DESC
One of the best Italian restaurants in the Kings Cross area,
Mediterraneo will never leave you disappointed
DESC
#...
有人可以向我解释一下<< DESC在上面的例子中意味着什么吗？它与常见的字符串双引号有何不同？