Then they add aerobic exercises that get the heart and lungs to work harder and promote circulation.

VOA: standard.2010.02.26

Please go get the clicker at the Bass Circulation Desk, and they should have enough everybody in the class.

去巴斯借书处领取表决器吧,应该每人都能领取到一个

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

These cells around the outside form the interface, the placenta, where the maternal blood circulation meets the embryonic circulation and nutrients are passed back and forth that way in a very highly regulated and important way.

外层的细胞形成接触面,即胎盘,是母血与胎血,进行血液交换,及营养物质交换的场所,整个过程高度有序并且非常重要

耶鲁公开课 - 生物医学工程探索课程节选

The study was published in the journal "Circulation: Cardiovascular Quality and Outcomes."

VOA: standard.2010.03.04

The red blood cells that carry oxygen only live within your circulation for about a month and so you have to continually be replacing cells that are dying and so there are cells that are proliferating.

携带氧的红细胞,在你的循环系统中的寿命只有一个月,因此你必须持续不断地更新衰老的细胞,所以就有在增殖的细胞

耶鲁公开课 - 生物医学工程探索课程节选

At its peak in the 1970s, Reader's Digest boasted a circulation of 17 million in the United States alone, and its international editions sold millions more copies in many languages.

VOA: standard.2010.03.08