originally ad

基本解释

Twitter is an ad-hoc messaging service originally intended to allow users to update their friends with what they were doing.
Twitter是一个ad-hoc(一种无线互连对等网络结构) 实时信息服务网站，它最初的目的是让使用者的朋友及时地知道该使用者正在做什么。
It was originally built in 598 AD during the Sui Dynasty, and named as Tiantai Temple at the beginning. It was built according to the design from the founder - Grand Master Zhiyi).
始建于隋天皇十八年（598年），初名天台寺，是依据天台宗创始人智者大师亲手所画的样式所建的。
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Even though anti-dumping(AD for short) laws were originally intended to address predatory pricing by foreign firms, over time they became a tool of protectionism abused by many countries.
反倾销法本来是用于防范外国公司以掠夺性价格进行倾销，但却日益成为贸易保护主义的工具，被许多国家滥用。

Overlooked is that the ad originally came to the world's attention via that haven of tradition media, network television--and during the Winter Olympics, among the most expensive moments on TV.
FORBES: Magazine Article
That is, the ad to be aired during the game is not the one company executives originally hoped to use.
FORBES: SodaStream Is Bubbling Up With Super Bowl Ad