4.on the telephone
(speaking on the telephone)在打电话；在接电话
Linda remained on the telephone to the police for three hours.琳达和警察通了三个小时的电话。
She's on the telephone at the moment.她现在正打电话呢。
<英>(have a telephone that is connected)配有电话；装有电话
She wasn't on the telephone.她没安电话。
Are you on the telephone at home?你家里有电话吗？