One is in the U.S.at the Centers for Disease Control, where there is a sample of variola, which is kept, you know, frozen on ice in a heavily guarded facility.

一个在美国的疾病控制中心,那有一支天花病毒的样本,冰冻后置于重重保护之下

耶鲁公开课 - 生物医学工程探索课程节选

This is Los Angeles. It's kind of the hub or Mecca for yoga in the States.

这是洛杉矶。这在美国简直是瑜伽的中心或者是圣地。

瑜伽的魅力 - SpeakingMax英语口语达人

Where's the heart and soul of jazz in America?

美国爵士乐的中心在哪里

耶鲁公开课 - 聆听音乐课程节选