Lift yourself off the floor by carefully shifting your center of gravity. Press your hands into the floor and slowly begin to rock your weight back, off your feet and onto your hands.
双手扎实地按向地面，慢慢将重量向后放，重心落在双手上，抬起双脚。
2
New way: put away all those clothes that are hanging on your exercise machine, get your dumbbells out of the garage, lift all that junk off your step and weight bench and get them ready for some work.
In a certain range, if the lifting material beyond its corresponding weight, the circuit is cut off, so that the lift can not be carried out to ensure the stability of the crane.