So, this all starts, in terms of putting it in its historical context at the turn of the Century, we said we'd start right in on the 20th Century of where chemistry was.

从历史的观点来看,这些都起源于,上个世纪之交,我们说我们从。

麻省理工公开课 - 化学原理课程节选

For example, in terms of the atomic theory of matter, at the time at the turn of the Century, the understanding was that atoms were the most basic constituent of matter, meaning you couldn't break atoms up into anything smaller - that was it, you're done.

例如在原子理论中,在19，20世纪之交的时候,人们认为原子是,组成物质的最基本粒子,也就是说你不能,把原子再分割了,就这样了。

麻省理工公开课 - 化学原理课程节选

Someone else is going to come in and produce cola in this industry and that's exactly what happened in the U.S. At the turn of the last century.

其他公司会参与进来也生产可乐,这就是上个世纪末在美国发生的事情

耶鲁公开课 - 博弈论课程节选

Now the master of syncopation, of course, in music was Scott Joplin, African American composer writing a lot around the area of St. Louis in the turn of the twentieth century.

说到使用切分音的大师,我们自然想到斯考特·乔普林,是位多产的美国黑人作曲家,二十世纪初居住在圣路易斯地区

耶鲁公开课 - 聆听音乐课程节选