attain v. 指经过不懈的努力获得未曾预料到的结果；也可指达到某一目标。
The salesperson attained his sales goal for the month.
这名销售员完成了当月的销售目标。
acquire v. 多指经过努力逐步获得才能、知识、习惯等，也可用于对财物等的获得，该词强调"一经获得就会长期持有"的含义。
It is through learning that the individual acquires many habitual ways of reacting to situations.
正是通过学习，个人才得以获得应付各种情况的习惯做法。