“无声的”的英语？

嘉宝拍过24部电影，先是无声的，后是有声的。Garbo made two dozen films, first silent pictures then talkies.但是,这些大自然的无声的信息,具有双重直接的含意.But two distinct translations attached to these dumb expressions.监视哨只是些无声的人影罢了.The lookouts were silent shadow...