Explanation: Trigger program or externalprocedure detected on error.
说明：触发程序或外部程序上的错误检测。
2
The substantive requirement embodies the inner value of equality of opportunity whereas the formal requirement expresses its externalprocedure. Both of them are indispensable.
实质性要求代表了机会平等的内在价值，而形式性要求代表了机会平等的外在程序，两者缺一不可。
3
Specifying the access level, deterministic, external action attributes of the procedure.