dial signal的用法和樣例：
例句
- When you hear the dial tone, dail the number.
聽到撥號音后，就可以撥號碼了。 - The wizard could not detect a dial tone.
嚮導無法檢測撥號音。 - Winds did not strengthen appreciably after the Strong Wind Signal came into effect, but due to the storm most places saw a wind direction changing to NE.
三號信號發出后本地風勢並沒有明顯增強，但風向已逐漸轉向東北。
