statement block

• 语句块

statement block的用法和样例：

例句

1. Statement blocks are made up of lines of code delimited by colons.
   语句块由冒号分隔的代码行组成。
2. Note that each line within a basic block must be indented by the same amount.
   需要注意的是每一行都要有相同的缩进来标识这是同一个语句块。