6.When the clock strikes 12 at midnight,people begin to set off firecrackers and fireworks. 当钟声午夜敲响十二下时，人们开始燃放烟花和爆竹。6. When the clock strikes 12 at midnight, people begin to set off firecrackers and fireworks. -- 当钟声午夜敲响十二下时，人们开始燃放烟花和爆竹