That tradition is said to have started when an Austrian man gave a a diamond ring tothe woman he wanted to marry.

据说这一传统来源于一位奥地利男子送了一枚钻石戒指给他想娶的女人的故事。

youdao

A: a reversal in the rotation of Earth is impossible.

答：地球发生相反方向的旋转是不可能的。

youdao

If so, this would be a a progressive step.

如果真是这样，这就前进了一大步。

youdao

By the eighteenth century, a greenhorn had the meaning it has today - a person who is new in a job.

VOA: special.2010.05.23

But this is a -- this raises a problem, that we'll see actually in just a moment having this duplication.

但这就引起了一个问题，我们刚才看到了,我们有一个重复的值。

哈佛公开课 - 计算机科学课程节选

it's a two-and-a-half-year-long program that mixes biology, chemistry, physics and computer science together.

这门课是一个两年半的项目，涵盖了生物学、化学、物理学，还有计算机科学。

与教授的面谈 - SpeakingMax英语口语达人

Actually, if it continues like this we'll have a problem - a big problem.

NPR: Businesses Hit Hard by Turmoil in Kenya

But Kathleen has a -- forged a reputation for bipartisan problem solving in her own right.

WHITEHOUSE: Swearing In Sebelius and Locke

Perhaps problems big enough to shake the entire system are not once-a-century events, but once-a-decade events.

FORBES: Christmas, Kurtosis, Fat Tails, Black Swans And Risk Management, Pt. 2