1. be bound to 很有可能的,肯定会(=likely)
Don’t lie to her. She’s bound to find out. 别骗她,她肯定会发现的。
2. be bound (by sth) 受(某事物)约束
•a binding contract/promise/agreement 具有约束力的合同/承诺/协议等
You are legally bound to report the accident. 法律上你有责任报告这起事故。
3. be/feel bound to do sth有义务做某事,有责任做某事
A son is duty bound to look after his mother. 儿子照顾母亲是义不容辞的
4.by/in leaps and bounds 突飞猛进,飞速发展