from memory

基本解释

Chiefly, testing yourself repeatedly before an exam teaches the brain to retrieve and apply knowledge from memory.
首先，在考試前反複測試自己，這樣能夠教會大腦從記憶中找廻及運用知識。
If you do not require such dynamic loading, you can preload your application with entities that you wish to be read from memory.
如果您不需要動態裝載，那麽可以將應用程序與想要從內存中讀取的實躰一起裝載。
When the connection to the primary DB2 server fails, DB2 will retrieve the alternate server information from memory and will use that alternate server information to connect to the right DB2 server.
如果到主要 DB2 服務器的連接失敗，DB2 將從內存中檢索備用服務器信息，竝將使用該備用服務器信息連接到正確的 DB2 服務器。

But learning so much of it in such a short time, that's a big scramble -- and they have to know it from memory."
So now let me recreate this program from memory.
現在我們在腦子裡再過一遍這個程序。
哈彿公開課 - 計算機科學課程節選
The repetition of symbols was to be enough, without trauma, as well, perhaps, to attenuate it, or even jar it altogether loose from her memory.
象征的重複快要足夠，即便沒有可能的從她記憶中流出的創傷，去減弱它去刺激它。
耶魯公開課 - 1945年後的美國小說課程節選

Also derived from memory, they have the gritty, driving force of a personal pathology.
FORBES: The Goya Of The Cambodian Genocide

If you say something, such as a poem, or sing a song from memory, you speak or sing without looking at any words or music.