Jonah Leff is the director of operations for Conflict Armament Research.

Jonah Leff 是冲突军备研究的运营总监。

Jonah Leff says this finding was based on the damage found on some of the ammunition.

Jonah Leff 说， 这一发现是基于在一些弹药上发现的损坏情况得出的。

Mr. Leff says the researchers are almost sure the ammunition was dropped by air. But he adds that they cannot confirm that it came from Sudanese aircraft.

莱夫先生说，研究人员几乎可以肯定弹药是空投的。但他补充说，他们无法确认它来自苏丹飞机。