乐器: musical instrument...
甜美: sweet, pleasant, happy...
证件: certificate, papers, credentials, document, ID...
缺失: deficiency, shortcoming, hiatus...
融洽: harmonious, friendly relations, on good terms with one another...
忍心: to have the heart to do sth, to steel oneself to a task...
精神病: mental disorder, psychosis...
阶级: (social) class...
出租: to rent...
掀起: to lift, to raise in height, to begin, upsurge, to set off (a campaign)...
