每一个标记定义了每个变量的名称和数据类型。

Each tag defines that variable's name and data type.

youdao

变量名称作为开始和数据类型为字符串类型。

Name the variable as launch and make the type as string type.

youdao

变量名称作为开始和数据类型为字符串类型。

Name the variable as launch and make the type as string type.

youdao