dial signal的用法和樣例：
例句
- When you hear the dial tone, dail the number.
聽(tīng)到撥號音后，就可以撥號碼了。 - The wizard could not detect a dial tone.
向導無(wú)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(fā)出后本地風(fēng)勢并沒(méi)有明顯增強，但風(fēng)向已逐漸轉向東北。
