参观者用英语：visitor。
英 ['vɪzɪtə(r)] 美 ['vɪzɪtər]
n. 参观者；访问者；访客。
When in New York City, it is customary for the visitor to take in a Broadway show.
参观者到了纽约市，通常都会去百老汇观看演出。
The visitor twisted his neck to look at the photograph on the wall behind him.
参观者扭过头看他身后墙上的照片。
辨析：
visitor, guest
这两个词的共同意思是“客人”。其区别是：
visitor不一定是事先邀请好的,也不一定受到款待; 而guest一般是事先受到邀请并受到款待的。例如:
She has many visitors today.她今天客人很多。
She's having a guest for dinner tonight.她今晚有位客人来吃饭。
吃货和世界
