不仅要保持每晚9小时的充足睡眠,而且要保持好心情用英语怎么说

问题描述:

不仅要保持每晚9小时的充足睡眠,而且要保持好心情用英语怎么说

We should not only have 9 hours of sleep every night,but also keep a good mood.