Ϻxh(hun)Ƽ˾a(chn)ĺx۱ϩڲͬpHֵlîa(chn)Ʒķ@IJPHֵ^γɽ(lin)ΠγxӾ۱ϩ͵ͷ;SPHֵᷴ(yng)ҺAԵu,ʹxӾ۱ϩup,ܽԺ@NF(xin)ԚwڡpHֵlP(gun)ķӃ(ni)ͷӾۺc(yng),γһ朗l(lin)ͮa(chn)Ʒ,Ԍ(do)®a(chn)ƷܽܲѺͷۺС;ڸpHֵ,Ԅ(chung)һN(sh)ϩ(NTP),NTPǷ(yng)Нڵ߀ԭ,ķ(yng),ͬrҲNTPD(zhun)Ƅ,(do)Ka(chn)ƷĽ,ʹܽԺ
xh(hun)xӾ۱ϩSضȵ׃څ,ӳ˷(yng)ضȌϳɮa(chn)ƷӰҎ(gu)S(yng)ضȵ,a(chn)ƷķӣȻu½ԭ,ɻa(chn)ڵ͜(sh),T(do)Lھ,Bi(yng)L,Ķɵõ߷xӾ۱ϩa(chn)Ʒ;S(yng)ضȵ,ķ(yng)ļM,푑(yng)ٶ,AڽKֹBi(yng),ɮa(chn)Ʒͷ(yng)Ĝض̫,Ҳ(yng)̫,ʹ(yng)rg̫L,ӰЧʵķ(yng)(yng)ض^ߵԒ,ϵy(tng)(ni)ɻ(yng)ԽԽ,ըһ,ʹ˴˷g(lin),ɞһzIJɴ˿Ҋ,m(dng)?sh)ķ?yng)ضǫ@Įa(chn)ƷҪC,Ҍm(dng)?sh)ķ?yng)ضȵĜضȿ20 - 30淶