It is a public good if one investor expends the time to act as a responsible owner , all investors benefit .

这是一种公益事业如果一位投资者肯花时间，充当一个负责任的所有者，所有投资者都会受益。

At some point , american politicians may ask why the us expends blood and treasure in order to achieve security in the middle east for the benefit of china .

到了一定的时候，美国政治家也许会问，美国为什么要付出鲜血与金钱，就为了在中东地区实现对中国有利的安全保障？