丢三落四: forgetful, empty-headed...
圆珠笔: ballpoint pen...
订婚: to get engaged...
部分: part, share, section, piece...
报答: to repay, to requite...
留恋: reluctant to leave, to hate to have to go, to recall fondly...
吼: to roar, to howl, to shriek, roar or howl of an animal, bellow of rage...
遭到: to suffer, to meet with (sth unfortunate)...
神情: look, expression...
微妙: subtle...
