事故: malfunction; trouble; fault; failure; mistake; accident; mishap 短语和例子造成事故 bring about an accident; 减少事故 cut down accident; 预防事故 provide against accidents; 交通事故 traffic accident; 一次事故使他双目失明
专家: specialist; expert; proficient 短语和例子水稻专家 expert in rice-growing; 外国专家 foreign expert; 外语专家 foreign language expert; 心脏病专家 specialist in heart disease; 眼科专家 ophthalmologist; eye specialist;
