我比较喜欢前者的设计方案: joan and jane are sisters.the former is a pianist the latter is a singer
互相: mutual; each other 短语和例子互相包庇 harbour [shield] each other; 互相策应 echo one another; take concerted action; in coordination with one another; 互相吹棒 flatter each other; logroll; claw me and i'll
