假如你陪你校的外籍教师smith先生去音乐厅听音乐，在门口的布告栏里看见一张观众须知，内容如下：
观众须知
1、一人一票，凭票入场;
2、场内严禁吸烟;
3、食品和饮料请勿带进场内;
4、演出时请勿照相;
5、演出时请勿使用传呼机和移动电话;
6、提前30分钟入场。
smith先生不懂中文，他很想知道布告栏里写着什么。现在，请你把观众须知的内容用英语告诉smith先生，并把要讲的话写出来。
mr. smith, it is a notice to the audience. it says that we should enter the concert hall 30 minutes earlier before the concert starts. entrance to the hall is by ticket only, each one each ticket.
史密斯先生，这是一则观众须知。上面说我们应该在音乐会开始前30分钟入场，每人凭票进入。
as a rule, food or drink should not be taken into the hall. of course, smoking is not allowed in the hall either.
按照规定，食品和饮料不得带进场内，吸烟也是不允许的。
please don't bring your digital camera with you because no photos can be taken during the concert. and what is more, beepers and mobile phones must be off during the concert.
请不要携带数码相机入内，因为场内严禁拍照。另外，音乐会期间，传呼机和手机必