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.
互聯網的前身是1969年美國國防部建立的名為阿帕網的計算機網絡，阿帕網代表“高級研究計劃署網絡”。

六級詞匯講解：
本句的主干是The Intemet had its origins...。which引導的非限制性定語從句修飾ARPAnet。have one's origin in...意為“起源于，追溯至……。如：

The great depression ofthe economy has its origins in the trade for a decade.
經濟的蕭條源于該國過去十年間的貿易行為。

stand for意為“代表，象征”。如：
It is known to all that the olive branch stands for peace.
眾所周知，橄欖枝象征著和平。

英語六級考點歸納：
與stand相關的短語還有：

stand by意為“支持，支援；袖手旁觀”。如：
1 won't stand by and watch others humiliate her in public.
我不會坐視著她在公共場合被人羞辱的。

stand out意為“突出；杰出”。如：
That pretty girl stands out in a crowd.
那個漂亮的女孩在人群中很出眾。

stand off意為“遠離；避開”。如：
He's trying to stand offher in public.
他有意地在公共場合避開她。

stand up to意為“經得起；勇敢地面對”。如：
The cancer patient said he would stand up to death.
這名癌癥患者說，他將勇敢面對死亡。