1.velvet: a type of cloth made from silk,cotton or NYLON,with a thick soft
surface 丝绒；天鹅绒 a velvet dress 天鹅绒连衣裙
velvet curtain 天鹅绒窗帘
2.backdrop：a. a painted piece of cloth that is hung behind the stage in a
区别complement,compliment,complementary,complimentary Compliment：n. a.（U） a remark that expresses praise or admiration
of sb 赞扬；称赞 to pay sb a compliment 对某人表示赞扬
Complement : v. to add to sth in a way that improves it or makes it more
attractive 补充；使完美；使具有吸引力 eg.The team needs players who complement each other. n. a. a thing that adds new qualities to sth in a way that improves it or makes it moore attractive 补充物；补足物 b. （语法中的）补语；补足语
to return the compliment :to treat sb in the same way as they have treated you
照样回敬 b. complements ：polite words or good wishes , especially when used to express praise and admiration 致意；问候； 祝贺 eg. Complimens of the season! 谨致节日的祝贺！ Please accept these flowers with the compliments of the manager. 请接受经理送的鲜花。
stage in a theatre as a part of the scenery （舞台的)背景幕布 b. everything that can be seen around an event that is taking place,but which is not part of that event (时间发生时）周围陪衬景物 c. the general conditions in which an event takes place .which sometimes help to explain that event （事态或活动的）背景 eg.It was against this backdrop of racial tension that the civil war began.
注：区别backdrop and background Background: a. the details of a person’sfamily ,education,experience etc.
出身背景；学历；经历 b. the circumstance or past events which help explain why sth is how it is； imformation about these （事态发展等的）背景 background imformation/knowledge 背景资料/知识 eg. The elections are taking place against a background of violence .
v. To tell sb that you like or admire sth they have done,their appearance.etc.
赞美；称赞；钦佩 固定搭配: compliment sb on sth Eg. She complimented him on his excellent German.
plimentary: a. expressing praise ,admiraHale Waihona Puke ion etc. 表示钦佩的，赞美的
a complimentary remark 赞美的言辞 b. given free 免费的；赠送的 complimentary tickets for the show 演出赠券 常用搭配: be complimentary about sth
get/be lost in sth : to be giving all your attention to sth so that you do not
notice what id happening around you 全神贯注于；沉浸于 Other phrases: be lost for words be lost on sb be lost to the word
make up for lost time (惊讶、困惑等而)不知说什么好 未被某人理解（或注意） (全神贯注于某事而)不注意周围的事物 弥补失去的时间
Complementary：adj. Two people or things that are complementary are
different but together form a useful or attractive combination of skils, qualities or physical features 互补的；补充的；相互补足的 固定搭配: complementary to sth eg.The school’s approach must be complementary to that of the parents.