tethered  
adjective uk/ˈteð.əd/ us/ˈteð.ɚd/
  (TIED)      
  束缚
tied to a post or fixed to the ground with a rope or chain
  a tethered goat 拴着的山羊 
 tethered balloon rides 乘系留气球上天 
 See: tether
 - More examples
 - Have a sweeping view of the magnificent Angkor temples from a tethered helium balloon.
 - Every morning I walked through a dusty olive grove past a tethered donkey to fetch the hard crusty bread.
 - So, this balloon stayed tethered and held down by a strong group of volunteers.
 - I reached a great plain where a grazing horse was tethered.
 
  (MOBILE PHONE)      
 internet & telecoms specialized(用手机为其他设备提供无线网络)系连的 
using a mobile phone as a wireless internet connection to which you can connect other devices
  an unlimited smartphone plan with a 5GB tethered option 带5GB绑定选项的无限智能手机套餐 
 - More examples
 - A tethered iPhone offloads its 3g "unlimited" bandwidth to the tethered device.
 - Tethered data doesn't cost the company anymore than what I use normally.
 - The ipt3 is tethered.
 - The updates will be made over the air or through a tethered PC client.
 - I'm hoping there will be a way to use a tethered iPhone for the internet connection.