名詞 viewer:

1. a close observer; someone who looks at something (such as an exhibition of some kind)
   同義詞：spectator, witness, watcher, looker
2. an optical device for viewing photographic transparencies

1. Letters from viewers express their dissatisfaction with current programmes.
   電視觀眾來信表示對當前節(jié)目不滿。
2. For every viewer who "mustn't miss him tonight" there is another for whom he is the man one most loves to hate.
   每逢有觀眾覺得“今晚節(jié)目決不可錯過此人”, 也會有另外的觀眾極為討厭此人。
3. A viewer or listener's telephone conversation with or telephone call to the host of such a show.
   熱線聽眾或觀眾上述節(jié)目中與主人進行電話交談或打電話的觀眾或聽眾

view.er

n.（名詞）
One that views, especially an onlooker or spectator.
觀察者：觀看者，特指旁觀者或者觀眾
Any of various optical devices used to facilitate the viewing of photographic transparencies by illuminating or magnifying them.
觀察器：通過變亮或者放大來提高圖像清晰度的一種視覺設備
A person who watches television:
看電視的人：
例句：
viewers of prime-time shows.
電視黃金時間的觀眾