identify 明确 从1堆可选项中辨别出 叫明确 identify the objective 明确目标
recognize 识别出你以前知道的事或人 i recognize you 我认出你了
discern 费力的识别 比如在黑暗中识别建筑 努力识别他的意图
distinguish 识别2者见的差异 The twins are so alike that no one can distinguish one from the other
discriminate 把2者区分开 The law discriminates between accidental and intentional killing 意外杀人和故意杀人在法律上是有区别的.
differentiate 辨别出2者不同（事物）你能辨别出这2块手表的不同么