Whenever we need to use one of the variables, you pop back into PHP mode and issue an echo statement to write the variable's value directly into the Web page text.
当需要使用某个变量时，就退回php模式，并发出一条echo语句将该变量的值直接写入网页正文中。
2
You can go into and out of PHP mode as necessary (to issue echo statements that output variables into the Web page as I've done above, for example).
Materials and Methods:40 patients were studied using FLAIR sequence and conventional spin echo(SE). The mode of presentation of the lesions were compared.