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be duty-bound to

有责任（义务）...

1、有责任

... duty-bound 应当 ; 职责所在 ; 义不容辞的 be duty-bound to 有责任 duty-bound not to turn back 义无反顾 ...

be duty-bound to do sth有责任做

be duty-bound to do有义务做某事

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