1. Sharp grade cutoffs are the rule at margins of ore bodies. 品位的急剧下降是矿体边界上的规律。
2. But until now, no one that I know of has tried to predict the cutoffs, which is what we are doing. 但是直到现在，据我所知，没有人试图预测界限在哪里（即到底恐龙的身体大到多大时，它才没法跑动）。这也是我们正在做的一件事。
3. Standards of cutoffs should be redetermined when the development technology or the abundance of data changes significantly. 当油田开发工艺、资料丰富程度等有较大变化时，应重新确定物性下限标准。
4. The accuracy of individual cutoffs was demonstrated by sensitivity, specificity, and positive and negative predictive values. 个体截断点的准确性用来表示敏感性、特异性、正面和负面预测值。
5. Often the guy with the shiny tent and cool outfit is selling the same stuff as the guy in cutoffs with a pile of parts in front of him. 往往在崭新帐篷里一位穿着讲究的人与另一个身前堆着一堆零件、但穿着牛仔短裤的人都在卖相同的零件。
