例如，小体形品种的狗的IGF 1比大体形品种的犬要少，而且它们往往活得更长久。
For example, smaller breeds of dogs have less IGF1 than larger breeds and tend to live longer.
众所周知结婚的人往往生活得更健康、寿命更长，但这一情况对于同居的人是否也适用却不太为人所知。
It is well known that people who are married lead healthier lives and live longer, but it was not known if the effect was the same for those living together.
应用推荐