τι σημαινει ενδειξη χοριακης και ταυτοχρονα περιοδος?

Question

&Chi;&rho;&epsilon;&iota;ά&zeta;&omicron;&mu;&alpha;&iota; &epsilon;&pi;&epsilon;ί&gamma;&omicron;&nu;&tau;&omicron;&sigmaf; &tau;&eta; &gamma;&nu;ώ&mu;&eta; &sigma;&alpha;&sigmaf;&hellip;. &Epsilon;ί&chi;&alpha; 4 &mu;έ&rho;&epsilon;&sigmaf; &kappa;&alpha;&theta;&upsilon;&sigma;&tau;έ&rho;&eta;&sigma;&eta; &kappa;&alpha;&iota; &pi;ή&gamma;&alpha; &sigma;ή&mu;&epsilon;&rho;&alpha; &tau;&omicron; &pi;&rho;&omega;ί &gamma;&iota;&alpha; &chi;&omicron;&rho;&iota;&alpha;&kappa;ή &epsilon;&xi;έ&tau;&alpha;&sigma;&eta;. &Pi;&rho;&iota;&nu; &pi;ά&omega; &nu;&alpha; &pi;ά&rho;&omega; &tau;&alpha; &alpha;&pi;&omicron;&tau;&epsilon;&lambda;έ&sigma;&mu;&alpha;&tau;&alpha; &pi;&omicron;&upsilon; ή&rho;&theta;&epsilon; &kappa;&alpha;&nu;&omicron;&nu;&iota;&kappa;ά &eta; &pi;&epsilon;&rho;ί&omicron;&delta;&omicron;&sigmaf; , &pi;&alpha;&rho;ό&lambda;&alpha; &alpha;&upsilon;&tau;ά &pi;&eta;&rho;&alpha; &tau;&alpha; &alpha;&pi;&omicron;&tau;&epsilon;&lambda;&epsilon;&sigma;&mu;&alpha;&tau;&alpha; &tau;&eta;&sigmaf; &chi;&omicron;&rho;&iota;&alpha;&kappa;&eta;&sigmaf; &kappa;&alpha;&iota; έ&delta;&epsilon;&iota;&xi;&alpha;&nu; 4,7!&Tau;&iota; &sigma;&eta;&mu;&alpha;ί&nu;&omicron;&upsilon;&nu; ό&lambda;&alpha; &alpha;&upsilon;&tau;ά?