一群来自美国科罗拉多州科林斯堡市、被称为“信鸽特快”的信鸽们是世界上最后一批鸟类邮政服务的成员。

These pigeon couriers are members of the last avian postal service in the world from the U. S. city of Fort Collins, Colorado.

youdao

科林斯堡六万两千户家庭购买此智能仪表总共要花掉两千万美元，福里曼说，平均每个家庭大约要花三百二十二美元。

Buying smart meters for Fort Collins's 62, 000 homes would cost about $20 million, Freeman says, which comes to about $322 per household.

youdao