estimate表示的“估价”或“估价”只是猜测，甚至只是一种想法。
Though it may be possible to measure the value of material goods in terms of money, it is extremely difficult to estimate the true value of the services which people perform for us. 虽然用金钱来衡量物质产品的价值是可能的；但要估计人们为我们提供的服务的真正价值却极为困难。
One authority made a census of the spiders in a grass field in the south of England, and he estimated that there were more than 2,250,000 in one acre. 一位权威对英国南方一块草坪上的蜘蛛作过统计，他估计每英亩有2,250,000多只蜘蛛。
evaluate很少用来表示“估价”或“估计”某物的市场价值，而是用来表示“评价”。如“领导对他的评价很高”。
By marks in numbers or letters, the teacher evaluates a student's work.
老师用数字或字母的符号来评价学生的作业。
The scientists were still evaluating their data.
那些科学家还在评价他们的资料. I can't evaluate his ability without seeing his work. 我没有看到他的工作情况, 无法评论他的能力.