If you take one of those individual grains of sodium chloride, look at it carefully, you will see the edges look like this.

如果你拿起,氯化钠晶体的一粒，仔细观察，你可以看到这样的棱角。

麻省理工公开课 - 固态化学导论课程节选

It's really rough around the edges.

它总是艰难地在边缘徘徊。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

If you have that sort of high-level, this is where we're going, this is the vision, this is the next 30 days and three months and six months and a year maybe, it makes it very, very easy to set priorities and for all of the edges of the company to set their own priorities to do the right thing.

如果你做到这么高水准的内部交流，就与我们的前进方向不谋而合，这就是未来，这是接下来30天,3个月，半年或是1年的前景，这让公司各部门的人,做正确的事,设立工作重点,变得非常容易。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选