appear 动词，它的名词形式是 appearance

appearance 名词
1.出现;显露[C]
John's appearance in the doorway was welcomed with shouts.
约翰出现在门口时,大家高喊着欢迎他。
2.露面;来到;演出[C]
The singer made her first appearance in a concert in Boston.
这位歌唱家第一次演出是在波士顿的一个音乐会上。
She's made a number of television appearances.
她已在电视上好几次亮相。
3.出版[C]
4.出庭,到案[C]
5.外貌,外观;外表[U][C]
The appearance of the old house completely changed.
那所旧房子的外观全变了。
6.景象,现象[C]
7.表面迹象[P]

appear 不及物动词 vi.
1.出现;显露
Gradually a smile appeared on her face.
她脸上渐渐地露出笑容。
2.似乎,看来好像[L][W][+to-v][+(that)]
It appears they are right.
看来他们是对的。
He appeared to be talking to himself.
他似乎在自言自语。
3.出庭,到案[Q]
She will appear in court next Friday.
下星期五她将出庭。
4.演出;陈列;露面[Q]
The famous singer is appearing this fall at the Music Festival.
这位著名的歌手将在今秋的音乐节上演出。
5.出版,发表
His third play appeared under the title The Web.
他的第三个剧本用《网》作书名出版。