These could reflect the declining weight of the human skeleton that seems to have accompanied the switch to settled life, which started some 15,000 years ago.
这能反映始于大约15，000年前向定居生活的转变时，伴随而来的人类骨架重量的下降。
2
I have lost and kept off 10 pounds of weight since I made my lifestyle switch and I have made many new friends that choose to pedal instead of drive.
自从转变了生活方式，我体重已经下降了10磅。我认识了很多选择自行车代替汽车的新朋友。
3
When carrying a bag or briefcase, switch sides frequently to avoid placing the bulk of weight on only one side of your body.