在指甲上都有半月痕,但是为什么有人小的时候有,而到成年人了却消失掉了呢?有的人是前段时间还有,而这段时间就减少了呢?中医的精是构成人体的基本物质。精来源于先天的禀赋及后天饮食营养。精气充足,生长发育和生殖功能正常,精力充沛,体力强壮,机体免疫力强;反之,精气衰弱,则生长 There are half a month marks on the nails, but why is it that when someone is young, it disappears when it comes to adults. Some people have some time ago while reducing the time. The basic substance of the human body. Fine comes from innate endowment and acquired diet nutrition. Adequate qi, growth and reproductive function normal, energetic, physically strong, immune body strong; the other hand, a weak essence, the growth