retentive

形容词 retentive:

1. good at remembering
   同义词：recollective, long, tenacious
2. having the capacity to retain something
3. having the power, capacity, or quality of retaining water

re.ten.tive

adj.（形容词）
Having the quality, power, or capacity of retaining.
保留的，保持的：有保持的品质、能力或才能的
Having the ability or capacity to retain knowledge or information with ease:
强记的，能记住的：具有容易地保持知识或信息的能力或才能的：
例句：
a retentive memory.
强记忆力

【引伸】
reten.tively
adv.（副词）
reten.tiveness
n.（名词）