Knowing you have people who support you keeps you healthy, mentally and physically: Chronic stress weakens the immune system and ages cells faster, ultimately shortening life span by 4 to 8 years.
知道有朋友支持自己会让你保持精神和身体健康：长期的紧张会更快削弱免疫系统，让细胞更快衰老，最终将你的生命缩短4到8年。
Although viruses can survive outside a host on household surfaces, their ability to duplicate themselves is compromised-shortening the virus' s life span.
尽管病毒能在宿主以外家中物件的表面存活，但其繁殖能力却因此受到影响，因而缩短了病毒的寿命。
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