新概念3里“It's only me”那科的metre是不是印错了？

'Mrs.Richards realized that it must be the man from the Electricity Board who had come to read the "metre".'
明明是指电表的意思，可是电表不是meter吗？metre什么时候有表的意思了？？

一首英文歌，歌词里有it's my.... It's mix ?? It's about It's time... it's time It's raining it impossible和it's impossible I think it's right ,( )it? it's fun 还是it 's funny it's是否等于it is 或it was