It was on this day 50 years ago when the launch of a prototype rocket known as the R-16 went seriously wrong.
五十年前的这一天，R - 16火箭原型的发射出现严重错误。
2
I went to a computer shop and bought two DVD-R DL disc in case one if it fails to burn, at least I still have another one to try before going to shop and buy more DVD-R DL discs.
我去了一个电脑商店买了两个DVD - R DL的光盘案件之一，如果它未能烧伤，至少，我还有另外一个来尝试才去商店，并购买更多的DVD - R DL光盘。
3
Since Microsoft went public in 1986, we have invested a total of $36 billion in R&D, creating a wide range of integrated technologies that have helped customers and developers do more.