The Constitution requires the president to seek the prior approval of Congress for military action.

宪法要求总统寻求国会对军事行动的事先批准。

Any resale of these claims is subject to prior approval by the Seller.

任何这些权利主张的转售须事先征得卖方同意。

Doctors in the surgery must obtain prior approval of the patient's family.

医生在做这个手术前必须征得病人家属的同意。

Should overseas travel be required, prior approval will be obtained from the client.

若需前往海外，事先须获得客户批准。

Your letter stating prior approval of the nationality of the vessel by the Purchaser.

表明承运船只已经买方同意的信函。