it's something that is still going on. We have got cases of conflict diamonds in Cote d'Ivoire in West Africa and also in Zimbabwe where hundreds of people were murdered in the Marange diamond fields recently."

VOA: standard.2010.08.05

if you've got a hill or valley and there's a cart on wheels it's going to go down to the bottom.

如果我们有一座山或者山谷，并且,有一个有轮子的车，这辆车会自动滑到底部。

麻省理工公开课 - 热力学与动力学课程节选

because it's got... It's really touristy. It's really busy. There's always things going on.

因为它变得……那里的游客真的很多。那里确实很热闹。经常举办活动。

伦敦的约会路线 - SpeakingMax英语口语达人