直到这之前，我一直以为是某些少年在跟我搞恶作剧。
Up until this point, I had assumed it was some youths playing a prank with me.
上月发布的这个浏览器的Alpha版总是允许通过附加软件(add - ons，意为插件，下同)的形式扩展自己的功能。但直到这之前还没有任何插件发布。
The browser, which launched into alpha last month, has always allowed for extendibility through add-ons, but none had been ported over until recently.
直到这位英国生物学家的博物馆发现之前，这第二种麂已经被科学遗忘了有差不多60年。
Until the British biologist's museum discovery, the second muntjac species had been largely forgotten by science for some 60 years.
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