Patients monitor themselves daily and call a toll-free telephone line to answer some simple questions about weight gain, swelling and breathing difficulties.
患者每天自行监测，可拨打免费电话就简单问题咨询，如体重增加，水肿和呼吸困难。
2
A local telephone service provider typically provides and bills for regional toll calls.
本地电话服务供应商会专门提供长途业务并收费。
3
A telephone scam in which a company sets up a toll number that is one digit different than a popular number, so that the company earns money when customers accidentally mis-dial the legitimate number.