And, as I already said, he loved mathematical instruments and telescopes.

我之前还说过，他喜欢数学仪器和望远镜。

youdao

It proved to be one of the mathematical instruments that were then in use among seamen.

这原来是当年海员们用的一种计算工具。

youdao

And, as I already said, he loved mathematical instruments and telescopes.

我之前还说过,他喜欢数学仪器和望远镜

耶鲁公开课 - 欧洲文明课程节选

And I just had a chance to see some of the incredible work that some of the young people here are doing -- folks who used mathematical equations to build musical instruments, and tests on bungee jumping with rubber bands and weights, and robots that were being built, all kinds of great stuff.

WHITEHOUSE: President Obama Speaks at Manor New Technology High School