It has long been a mystery how enough matter can reach these cosmic gluttons to swell them to such large sizes.
这个问题已经成为一个疑团，怎么会有如此充足的物质能够送给这些宇宙中的贪食客，让它们膨胀到这样大的尺寸。
Say a company wants to reach young men. It might buy ads on the sports section of a large portal such as Yahoo!. But it will also be paying for the women who visit that page.
比方说一家以小伙子为目标的公司，它或许会在如雅虎这样的门户网站的体育版块投放广告，但它也要为访问这个页面的女人们买单。
The rotors of a pump or a blower can reach high rotational speed, and the utility model is used for different use conditions, such as large pumping amount.
使泵或鼓风机等转子能达到高转速，大抽量及用于不同的使用条件下。
应用推荐