1·Her mother, herself a lilting mezzo, insisted that the Voice should never be stretched or overtaxed.
她的母亲是一位女中音，一直坚持认为声音不能负荷过度。
2·Vocal score for 2 soprano voice solos, 2 mezzo soprano voice solos, 3 tenor voice solos, 2 baritone voice solos, SATB chorus and piano accompaniment. Series: G. Schirmer Opera score Editions.
声乐评分2独唱女高音的声音，2女中音独唱的声音，3男高音独唱，男中音独唱2,satb合唱和钢琴伴奏。