材料丢失，不予补发。

The material will not be reissued if lost.

《新英汉大辞典》

由于有关此案的材料全部丢失，进一步的调查受到了阻碍。

Further investigation was hindered by the loss of all documentation on the case.

《柯林斯英汉双解大词典》

由于有关此案的材料全部丢失，进一步的调查受到了阻碍。

Further investigation was hindered by the loss of all documentation on the case.

《柯林斯英汉双解大词典》