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

No more will people struggle from month to month to live on an insecure wage.

BBC: A Point of View: The revolution of capitalism

The first Russia-listed exchange-traded fund is supposed to go live this month.

FORBES: Changing The Financial Landscape In Russia Is Not An Easy Task

"That would've been enough money for him to live on for a month, " says Dorsey.

WSJ: Simplicity and Order for All | Innovator of the Year 2012 Technology