It is safer to test whether the absolute value of the difference between the two numbers is less than a small acceptable tolerance 更好的方法是测试一下两个数之差的绝对值是否小于一个小的可接受公差。
2.
These two refinements can get a good trade - off between moving objects databases and its user about the acceptable tolerance for the imprecision of the information 该方案使移动对象数据库和用户对于信息不精确的容忍度之间得到了很好的协调。