340.The Internet had its origins in a 1969 U.S. Defense Department computer network called ARPAnet, which stood for Advanced Research Projects Agency Network.
互联网的前身是1969年美国国防部建立的名为阿帕网的计算机网络，阿帕网代表“高级研究计划署网络”。

六级词汇讲解:

本句的主干是The Intemet had its origins...。which引导的非限制性定语从句修饰ARPAnet。have one's origin in...意为“起源于，追溯至……。如：
The great depression ofthe economy has its origins in the trade for a decade.
经济的萧条源于该国过去十年间的贸易行为。

stand for意为“代表，象征”。如：
It is known to all that the olive branch stands for peace.
众所周知，橄榄枝象征着和平。

英语六级考点归纳

与stand相关的短语还有：

stand by意为“支持，支援；袖手旁观”。如：
1 won't stand by and watch others humiliate her in public.
我不会坐视着她在公共场合被人羞辱的。

stand out意为“突出；杰出”。如：
That pretty girl stands out in a crowd.
那个漂亮的女孩在人群中很出众。

stand off意为“远离；避开”。如：
He's trying to stand offher in public.
他有意地在公共场合避开她。

stand up to意为“经得起；勇敢地面对”。如：
The cancer patient said he would stand up to death.
这名癌症患者说，他将勇敢面对死亡。