opera

opera

(It's a type of play and the actor/actress always sings in it.)

(n)【C】歌劇

ex:The famous actress plays the lead in the opera.

ceiling

ceiling

n. 名詞 [C]天花板; 頂篷
definition: To overlay or cover the inner side of the roof of; to furnish with a ceiling; as, to ceil a room.
example1:The new houses in this locality have very high ceilings.這個地區的新房子天花板甚高。
example2:There is a fly on the ceiling.有一隻蒼蠅停在天花板上。

what I want to say:See the video can help you change the ceiling faster