private string BuildVolumeDescriptionCn(JsonArc arc, int index) { return($"《猫武士》{arc.CnReferAs ?? arc.Cn}第{OrdinalZh[index]}册"); }
private string BuildVolumeDescriptionEn(JsonArc arc, int index) { return($"the {OrdinalEn[index]} book of {arc.En} arc"); }