control statement的用法和樣例：
例句
- A sequence of job control statements and data submitted to an operating system from an input unit.
一種從輸入設備提交到操作系統的作業控制語句和數據的序列。 - It is conventional to indent the body of a control flow statement so the reader might easily determine where it begins and ends.
最好將流程式控制制語句縮進排列，使讀者能方便地看出起點與終點。
