六级On the flip side, companies like Virgin Galactic are plotting a bottom-up assault on the space dream by making it a reality to the public.

另一方面，维珍银河（Virgin Galactic）等公司正在策划一场自下而上的太空之梦，让它成为现实。

六级But assaults often occur on Friday and Saturday nights, near the bars downtown.

但袭击通常发生在周五和周六晚上，靠近市中心的酒吧。

六级Men commit nearly 90 percent of violent crimes in the United States and almost all sexual assaults.

美国近90%的暴力犯罪和几乎所有的性侵犯都是男性所为。

六级Assaults often happen on school campuses

校园里经常发生袭击事件