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Manypeoplehurttheirbackswhentheytrytoliftheavythingsfro...
问题详情:Manypeoplehurttheirbackswhentheytrytoliftheavythingsfromthefloor.Itiseasytohurtyourbackmuscle(肌肉)whenyoutrytopickupaheavything.However,thereisacorrectwaytoliftthingsfromthefloor.Ifyoupickuph...