It's not clear what the motive for the bombing might be.

目前并不清楚爆炸案。

How on earth did some of those cases not explode?

其中一些案件到底是如何不爆炸？

We don't know exactly what caused this explosion, what kind of device.

我们不清楚爆炸案发生原因，也不知道是哪种爆炸装置。

The ministry says some 10,000 people have been evacuated. There is no word yet on the cause of the blasts.

国防部表示，1万人已经得到疏散。目前还不了解爆炸案起因。

We have no idea what those targets were, but they were in the direction of the airport and some military barracks.

我们不知道这些爆炸目标是什么，但它们都是从场和部分军营方向传来。

Her town was in trouble, and she needed to figure out a way to help it that didn't involve exploding potions.

她小有烦了， 她需要想出一种不涉及爆炸药水方法来帮助它。

While Pentagon Officials say they don't know what caused the missile tube explosion, they point out that Soviet missiles use highly volatile liquid fuel, and a fuel leak could have caused the eruption.

一些国防部官员表示他们不清楚导弹管爆炸原因，同时也指出，苏联导弹使用了稳定性极弱液体燃料，有可能是燃料泄露导致了这次爆炸。

It was an explosion which never should have happened, and a subsequent inquiry laid the blame not on anyone who had actually been on the tanker at the time, but on the owners of the tanker.

这是一起本不应该发生爆炸，随后调查没有将责任归咎于当时实际在油轮上人，而是归咎于这只油轮所有者。