但是很难去证实我们到底从中得到了多大的利益。
It's difficult to demonstrate that there would be substantial benefit, however.
尽管很难去证实，专家怀疑在一些空难里，电子干扰扮演了元凶的角色，这也是每趟飞机都要警告乘客勿在飞行途中使用电子设备的原因。
Although it has remained difficult to prove, experts suspect electronic interference has played a role in some airline accidents and have warned passengers not to be complacent.
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