The ancient Aztec civilization in current day Mexico used obsidian for making hunting tools and jewelry.

VOA: special.2009.09.16

Now, it used to be in the old days before I had kids, I could list off 15 current movies and help you a bit more with your dating strategy by giving you instant movie reviews, but now I have kids, I get to see precisely two movies a year, and the two movies I got to see this year were The Bourne Ultimatum and the Good Shepherd.

在我有孩子之前,我能列出15部热映的影片,我还能给你们提供不错的影评,帮助各位制定约会策略,但是现在我当爸爸了,我每年只能看两部电影,我今年看的两部就是,《谍影重重》和《特工风云》

耶鲁公开课 - 博弈论课程节选

But more than one hundred years passed before the current, widely used seat belt was developed.

VOA: special.2010.02.09

That study used computers and current ice-level information to predict future ice levels.

VOA: special.2009.05.05

The current system has been used since two thousand five.

VOA: special.2009.05.06

Economists point out that the current jobless rate is already higher than the hypothetical rate that was used to calculate the health of banks and other financial institutions in so-called "stress tests" earlier this year.

VOA: standard.2009.06.07