where it's at

You can get this skirt only in Paris; that's where it's at.

这种裙子只有在巴黎才能买得到, 这种样式在那很流行.

At such a period of reform, how could China's economics keep developing and where should it go in the future are concentrated by many scholars.

处于这样一个变革期，中国经济该如何发展、未来又该何去何从，成了众多学者关注的重点。

GJ 357 d, a super-Earth that is 6.1 times the Earth's mass, is the most intriguing because it orbits the star at a distance where the temperature might be just right to support liquid water on the surface.

另一颗“超级地球”GJ357d的质量是地球的6.1倍，最令研究人员感兴趣，因为它围绕恒星运行的距离使其表面的温度可能刚好适宜液态水的存在。

Urban areas, where most donors live, end up bearing the cost, according to Takero Doi, a professor at Keio University, since donors "tax write-offs subtract from other cities" revenue. "Ultimately, it's a zero-sum game."

庆应义塾大学（Keio University）教授土居丈朗（Takero Doi）说，捐款的成本最终由大多数捐款者生活的城市地区承担，由于对捐款者的减税会导致其他城市的收入减少，“这终究是一场零和博弈。”

His party's strength is concentrated in Osaka, where it has an organisation that has won local leadership and assembly elections, says Stephen Reed, professor of policy studies at Chuo University in Tokyo.

东京中央大学（Chuo University）政策研究教授斯蒂芬·里德（Stephen Reed）表示，桥下彻政党的影响力集中于大阪附近，在这里该党赢得了当地政府的领导权以及议会选举。

Indeed science is so good at what it does that there's always a temptation to drag it into problems where it may not be helpful.

事实上,科学是如此擅长于它所做的事情,以至于总有人想用它来解决它可能并不能给予帮助的问题。

Judging by the crowds waiting to get in this seems to be where it's at.

从争先恐后等待进去的人群来看,这似乎是个热闹去处.

This party's really where it's at, man!

啊, 这个晚会真棒!