The computer program was unable to discriminate between letters and numbers.

这计算机程序不能辨别字母与数字。

《牛津词典》

When younger kids learn computer science, they learn that it's not just a confusing, endless string of letters and numbers—but a tool to build apps, or create artwork or test hypotheses.

当年幼的孩子学习计算机科学时，他们会知道，计算机科学不仅仅是一串令人困惑、无穷无尽的字母和数字，而是一个开发应用程序、创建艺术作品或检验假设的工具。

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When younger kids learn computer science, they learn that it's not just a confusing, endless string of letters and numbers—but a tool to build apps, or create artwork, or test hypotheses.

当更小的孩子学习计算机科学时，他们知道它不仅仅是一串令人困惑的、无穷无尽的字母和数字，而是一种构建应用程序、创作艺术品或验证假设的工具。

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But we know already from week zero that computers ultimately represent all information with numbers, and if they want to represent letters inside memory, well what do they do or what do they use?

但是自从上周我们已经知道,计算机最终是用数字来表示所有的,信息，如果它们要描绘,在内存中的字母，它们该怎么做，用什么方式呢？

哈佛公开课 - 计算机科学课程节选

They want to represent letters and not just numbers.

它们想描绘字母而不只是数字。

哈佛公开课 - 计算机科学课程节选

Diets by numbers and letters -eDiets, Number Seven, The GI Diet.

还有关于数字和字母的减肥法,E减肥法,数字七,GI减肥法

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Add a couple of well-educated men of letters and numbers and I suspect you're probably there.

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Then he asked me if I was seeing a certain string of letters and numbers.

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Grids of multi-coloured letters and numbers illuminate the background, itself computer-enhanced to resemble a pitch-black sky.

ECONOMIST: New German photography