compound statement

基本解释

In this instance, the indentation isn't mandatory, as it is with a compound statement.
在本例中，缩进不是强制性的，就跟一个复合语句一样。
A compound statement consists of a flow control instruction, followed by a colon character (:), followed by a block of program statements.
一个复合语句包括一个流控制指令，后跟一个冒号（:），然后再是一个程序语句块。
The last thing in the compound statement should be an expression followed by a semicolon; the value of this subexpression serves as the value of the entire construct.
在这个复合的声明的最后要是一个由分号结尾的表达式。这个子语句的是作为整个结构的值的。