当在触发器的处理过程中抛出异常时，触发器终止，导致触发器触发的整个语句回退。
When an exception is thrown during processing of a trigger, the trigger aborts, and the entire statement that caused the trigger to fire is rolled back.
在基于UNIX的操作系统中，本行会使Python解释器自动启动，并在终止前处理文件中的语句。
On UNIX-based operating systems, this line causes the Python interpreter to start up automatically and process the statements in the file before terminating.
RCTE和终止SELECT语句都返回了4 个列，分别是递归的层数、下属的雇员编号、直属经理的姓名以及直属经理的雇员编号。
The RCTE and the final SELECT statement both return four columns, representing the level and the employee number of the subordinate and his name and finally the employee number of the direct manager.
因为不希望程序在出现执行错误时终止，所以将所有操作放在 eval语句中。
We wrap everything we do in an eval statement, since we don't want our program to die when an error occurs during execution.
当键入if语句和终止的冒号，并按键盘上的回车键时，Python解释器就知道您输入了一个复合语句。
When you type in the if statement and the terminating colon, then press Return (or enter) on your keyboard, the Python interpreter realizes you have entered a compound statement.
返回语句：一种特殊的语句，功能是终止当前函数，立即跳出到函数调用者。
A statement that causes a function to end immediately and return to the caller.
返回语句：一种特殊的语句，功能是终止当前函数，立即跳出到函数调用者。
A statement that causes a function to end immediately and return to the caller.
应用推荐