将一个英文句子重复三次，并在每次重复之间加上逗号分隔。 
"Life is like a box of chocolates, you never know what you're gonna get."
"Life is like a box of chocolates, you never know what you're gonna get," "Life is like a box of chocolates, you never know what you're gonna get," "Life is like a box of chocolates, you never know what you're gonna get."