使用公共电话时你必须准备好硬币。
使用电话卡比使用公共电话便宜。比对方付费的电话便宜得多。
Calling CARDS are cheaper than putting change into a public phone. They are a lot cheaper than calling collect.
有一天您发现拿着一部昂贵的手机到处走是一件很愚蠢的事，因为到处都有公共电话亭、住宅电话和办公电话，您可以方便使用。
One day you think it's silly to walk around with an expensive phone when there are all these public pay phones, home phones, and office phones at your disposal.
请使用电梯附近的公共电话。
该系统中的远程数据通信通过公共电话网络，使用由at命令集控制的MODEM调制解调技术来完成。
The long distance communication in the system is finished by using public telephone network and the MODEM techniques controlled by at orders.
有如下三个原因：第一，他们可以使用校园公共电话想和父母或朋友保持联系；
There are three reasons for it as follows. Firstly, they can use public phones at shool if they want to contact with their parents or friends.
现有的公共电话亭明年就不再使用了。
许多亚洲电信用户使用的服务，如公共电话网络，私营甚小孔径终端网络和宽带多媒体服务。
Many telecommunications customers use AsiaSat for services such as public telephone networks, private VSAT networks and broadband multimedia services.
公共电话交换网(PSTN)是最广泛使用的通信线路，因此在PSTN线路上传输视频具有广阔的应用前景。
It is most extensively used Lines of Communication to Public Switched Telephone Network (PSTN), hence the video surveillance system based on PSTN possesses widespread application prospects.
目前传真业务主要在公共电话网上承载，这种传真业务的使用给企业带来了巨额的支出。
So far, facsimile is mostly carried on PSTN (Public Switched Telephone Network), which brings numerous expenses together with the service.
他们总是使用手机，因为公共电话必须留给受害者免费使用。
And they always use mobile phones, because public phones must be left free for victims to use.
他们总是使用手机，因为公共电话必须留给受害者免费使用。
And they always use mobile phones, because public phones must be left free for victims to use.
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