Don't sing too loudly in the library; it's not polite.

不要在图书馆大声唱歌，那不礼貌。

同一单元的其他句子

• Music has the power to change our mood instantly.音乐有力量瞬间改变我们的心情。
• Do you often listen to classical music before going to bed?你经常在睡觉前听古典音乐吗？
• She plays the piano every day after school.她每天放学后弹钢琴。
• Don't forget to bring your guitar to the concert tomorrow.别忘了明天带你的吉他来参加音乐会。
• The rhythm of this song makes everyone want to dance.这首歌的节奏让每个人都想跳舞。