习惯用语be bound to1.必定, 一定be bound up in1.热心于, 专心致志于be bound up with1.与...有密切联系; 与...利益一致I'll be bound1.[口][用作插入语]我敢保证, 我敢肯定in honour bound1.[接不定式]理应 ...; 道义上必须...