Bound to happen.注定的
bound to:必然, 不得不, 必须
The question is bound to come up at the meeting.
会上必然要讨论这个问题。
I'm duty bound to visit my old aunt.
我有义务去探望年老的姑妈。
so I owe you favor.我还欠你们一个人情
owe:欠(债, 钱, 人情等)
I owe a lot to my wife and children.
我很感激我的妻子和孩子。
You can take your time to pay the debt you owe me.
你欠我的债可以慢慢还。
扩展:owe to:把 ... 归功于 ...
His success does not owe to luck but ability.
他的成功应当归功于他的能力而不是运气。