Unable to add background transfer request什么意思?求大神给说下……

Backgr Unable to add background transfer request什么意思?求大神给说下…… Unable to add to ,add into,add...to...区别 add to add to add...to... Unable to write to unable to connect to add,add up,add to,add up to的区别 unable to 意思 unable to write unable to reach internet unable to connect是什么意思 unable to process request. UNABLE TO PYOCESS REQUEST unable to get rid, unable to connect是什么意思