份额: share, portion...
散发: to distribute, to emit, to issue...
粗心大意: negligent, careless, inadvertent...
出难题: to raise a tough question...
摇头: to shake one's head...
钻研: to study meticulously, to delve into...
世袭: succession, inheritance, hereditary...
季军: third in a race, bronze medalist...
赛场: racetrack, field (for athletics competition)...
依靠: to rely on sth (for support etc), to depend on...
