Even by the end of the 19th century, however, new technologies began to emerge, many of them based on the same principles first developed for the telegraph system.

虽然到了19世纪末新的科学技术开始崛起，但是许多技术都是基于与最初发明电报同样的原理。

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In 1913, the Danish physicist Niels Bohr was the first to propose a theory of the atom based on quantum principles.

1913年，丹麦物理学家尼尔斯·波尔第一个提出基于量子原理的原子理论。

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From first principles, just based on the statistical math we've seen so far.

从第一性原理，就是基于前面学过的统计数学。

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The president that I work for, I always saw him trying to get first to the best policy based on his principles.

我辅佐的这位总统，我总会看见他努力根据自己的原则,规划出最好的政策。

普林斯顿公开课 - 国际座谈会课程节选

The methodological guide first recalls the main issues at stake regarding transboundary aquifers and the need for a more comprehensive approach based on IWRM principles (Part I).

UNESCO: THEMES