These words all describe sth that is extremely good.以上各词均形容某事物极好。
excellentextremely good指优秀的、杰出的、极好的NOTEExcellent is used especially about standards of service or of sth that sb has worked to produce. * excellent 尤用于修饰服务或产品的质量标准：◆The rooms are excellent value at $20 a night.这些房间一晚 20 美元太合算了。◆He speaks excellent English.他英语说得棒极了。NOTEExcellent is also used to show that you are very pleased about sth or that you approve of sth. * excellent 亦用以表示愉快或赞同：◆You can all come? Excellent!你们都能来？太好了！
outstandingextremely good指优秀的、杰出的、出色的NOTEOutstanding is used especially about how well sb does sth or how good sb is at sth. * outstanding 尤指在做某事上或某方面杰出：◆an outstanding achievement杰出的成绩
perfectextremely good指极好的、很好的NOTEPerfect is used especially about conditions or how suitable sth is for a purpose. * perfect 尤指条件状况极好或很合适：◆Conditions were perfect for walking.散步的环境再好不过了。◆She came up with the perfect excuse.她想出了极好的借口。
superb(informal) extremely good or impressive指极佳的、卓越的、出色的：◆The facilities at the hotel are superb.旅馆的设施棒极了。