它们又好看又甜用英语怎么说

"They are both beautiful and sweet" 可以用英文表示为 "They are both good-looking and sweet."

这句话中的 "good-looking" 和 "sweet" 分别表示 "好看" 和 "甜" 的意思。"good-looking" 是形容词，意思是好看的，常用来形容人或物的外貌。"sweet" 也是形容词，意思是甜的，常用来形容食物或气味。

例句：

"She is good-looking and sweet, everyone loves her." (她很好看，而且很甜，每个人都喜欢她)
"This cake is good-looking and sweet, it's perfect for my party." (这块蛋糕很好看，而且很甜，它非常适合我的聚会)