aim: 从本义“靶子”引申而来，侧重比较具体而明确的目标，但常指短期目标。
The policeman ~ed his gun at the fugitive.
警察用枪对准逃犯
goal: 指经过考虑和选择，需经坚持不懈的努力奋斗才能达到的最终目标。
When the boat floats through the throat, the goat in overcoat goes to the goal.
当船漂过狭口时,穿大衣的山羊朝目标走去.
purpose: 普通用词，既指以坚决、审慎的行动去达到的目的，又指心中渴望要实际的目标。
For what ~ are you doing that? = What is your ~ in doing that?.
你做那件事有何目的?
end: 指心目中怀着的某种目的，强调结果而非过程。较正式用词。
I was moved by the ~ of this novel.
我被这本小说的结局感动了
target: 指射击的靶，军事攻击目标。引申指被攻击、批评或潮笑的目标。
Republicans targeted her as vulnerable in her bid for reelection this year.
共和党人认为她在今年的再次参选中是不堪一击的攻击目标。
He squinted his eyes as though he were studying an object on the horizon.
他眯着眼睛，好像在研究地平线上的某个物体。
