a roomful of people的用法和樣例：
例句
- Once you have sung unaccompanied in front of a roomful of strangers, nothing should faze you.
一旦你能在一屋子的陌生人面前無伴奏地演唱，就沒有什麼可擔心的了。 - The kinetoscope, which could only be viewed by one person at a time, was soon replaced by screen projectors, which showed the movie to a whole room of people at once.
電影放映機一開始一次只能有一個觀眾，不過後來很快就被投影機所取代，這部機器可以讓一屋子的人一起欣賞電影。
