exchangern.交换器；换热器；兑换商exchangev.交换；兑换n.交换；交易所；兑换；交战exchange expenses交易费用exchange constant交换常数exchange of skill技能交流exchange by bills票据交易exchange choosing交易所选择exchange isotherm交换等温线exchangeable part可换零件exchange dumpting外汇倾销exchange of ideas思想交流exchange students交换学生

1. New charges proposed by the regional Bell holding companies to supplement subscriber line charges.
   地区贝尔控股公司提议增加新的收费以补充用户线收费。
2. A private telephone exchange that automatically connects internal "branch" lines to the external circuits of a telephone system.
   一种自动地将内部用户线连接到电话系统外线的专用电话交换机。