admissible signal pair的用法和样例：
- Gann intelligent system in the March 5 issue of the Unit Admission signal.
- Gann short-term in the wizard again on December 23 issued by the admission signal, indicating short-term unit will break out again.
- A red light is usually a signal of danger.
- I stood watching for the signal to change to green.
- Let's set the clock by the radio time signal.