In 1931, at Columbia University, Harold Yuri discovered this isotope, which has two.

931年在哥伦比亚大学，哈罗德尤里发现同位素，有两个核电荷数。

麻省理工公开课 - 固态化学导论课程节选

In 1931 they dropped convertibility of the pound sterling still called pound sterling even though it's not silver it was gold.

在1931年，他们放弃了英镑的可兑换性,仍然叫做英镑的话,即便它不是银，而是金。

耶鲁公开课 - 金融市场课程节选

By the end of 1930, you lost another 38% of your money; by the end of 1931, you lost another 50%; and by the end of--by June of 1932, you lost another 32%.

到1930年底,又损失掉38%,到1931年底,资产再损失掉50%,到1932年6月份,再损失掉32%

耶鲁公开课 - 金融市场课程节选