This is to acknowledge with thanks your letter of 30 th ult.
兹确认收到贵方上月30日函,谢谢.
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We regret our inability to anythingconcerning the firm mentioned in your letter of the 30 th ult.
对于上月30日贵函所要查询的公司,我们实在无法报告确切情况,甚为遗憾.
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The accuracy of ult rasound which qualify the accessory parotid gland is 84 %.
对副腮腺肿块的定性正确率达到84%.
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Ravage AOE decreased for level 1 and 2.
潮汐1级和2级的ULT的作用范围减少了.
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"your letter received on the 29th ult"