If you are complimentary about something, you express admiration for it.
例句
The staff have been very complimentary, and so have the customers...员工们对此大加赞扬，顾客们也一样。We often get complimentary remarks regarding the cleanliness of our patio.我们经常听人称赞我们的露台非常干净。
ADJ
(座位、票或书)免费赠送的
A complimentary seat, ticket, or book is given to you free.
例句
He had complimentary tickets to take his wife to see the movie.他有几张赠票，可以带妻子去看电影。...a complimentary copy of Dr Sherwood's recently published book.舍伍德博士最近出版的作品的赠书
英汉词典释义
adj.
表示敬意的，赞美的，恭维的
She made some highly complimentary remarks about their school.她对他们的学校给予高度的评价。Everyone had been most complimentary about the costumes.大家对这些服装赞不绝口。Don’t be fooled by all his complimentary remarks—they were all said with tongue in cheek.别让他的恭维话给蒙骗住了——那些话可不能当真。
赠送的
I’ve got complimentary tickets for the theatre.我得到了戏院的赠票。The supermarket operates a complimentary shuttle service.这家超市提供免费购物班车。