"Nice and happy" 用英语可以说成 "pleasant and cheerful"。
"Pleasant" 是一个形容词，表示 "令人愉快的、舒适的、宜人的"。
"Cheerful" 是另一个形容词，表示 "快乐的、高兴的、愉快的"。
举个例子：
The weather was pleasant and cheerful.
(天气很好愉快)
They had a pleasant and cheerful conversation.
(他们有一次愉快而高兴的交谈)
The atmosphere in the room was pleasant and cheerful.
(房间里的氛围愉快而高兴)
来源：英语词汇