英:[bi: baund ʌp in]
美:[bi baʊnd ʌp ɪn]
热心于;
1 献身于
mortgage devote
2 忙于某事
go about
3 专心致力于
buckle to
4 热衷于
burn addict be bitten over drool over be great on daffy about do a bundle on large for
5 忙于
involve busy up to the elbow