perceptible signals造句

例句与造句

1. But they believe that within the din are barely perceptible signals that can give the properly equipped prognosticator a slight edge.
2. The mirror galvanometer ( and later the syphon recorder ) had to be invented to produce a perceptible signal out of such a tiny dribble of current.
3. It's difficult to find perceptible signals in a sentence. 用perceptible signals造句挺难的