Many members of the church sang from memory.

许多教徒都是凭记忆唱颂歌。

《柯林斯英汉双解大词典》

He can recite that poem from memory.

他能凭记忆背诵出那首诗。

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But learning so much of it in such a short time, that's a big scramble -- and they have to know it from memory."

VOA: special.2011.07.11

So now let me recreate this program from memory.

现在我们在脑子里再过一遍这个程序。

哈佛公开课 - 计算机科学课程节选

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.

象征的重复快要足够，即便没有可能的从她记忆中流出的创伤，去减弱它去刺激它。

耶鲁公开课 - 1945年后的美国小说课程节选

Asteroid strikes and nuclear war are, from memory, two of the examples he uses.

FORBES: Nature on Uncertainty: Climate Change is Less Important Than We Thought

Natural disasters tend to fade from memory as scenes of destruction slip from prominence in the media.

ECONOMIST: In Katrina's wake

In 2009, he'd worked from memory and flubbed the wording, requiring a private do-over the next day.

NPR: The Inaugural Do-Over: Chomping Gum, Savoring View