retention

詳細解釋：

re.ten.tion

n.（名詞）

The act of retaining.
保持：保持的行為
The condition of being retained.
保留，滯留：被保持的狀態
Capacity or power of retaining.
保持力，持續力
An ability to recall or recognize what has been learned or experienced; memory.
記憶力：記起或認識出已經學過或經歷過的事物的能力；記憶力
Something retained.
被保持物
Medicine Involuntary withholding of wastes or secretions that are normally eliminated.
【醫學】 停滯：正常情況下應被除去的廢物或分泌物的不自覺的保留

來源：
Middle English retencioun
中古英文 retencioun
from Old French retention
源自 古法文 retention
from Latin retentiô retentiôn-
源自 拉丁語 retentiô retentiôn-
from retentus [past participle of] retinôre [to retain] * see retain
源自 retentus [] retinôre的過去分詞 [保持] *參見 retain