Unless these questions are solved, the region will remain a powderkeg.
除非这些问题得以解决，否则该地区会一直是个火药桶。
《柯林斯英汉双解大词典》
2
What was once a forest becomes a virtual powderkeg of untapped fuel.
森林就变成了未开启的虚拟引火气罐。
3
The fact that the two vessels did sink is an unalterable fact of history, and while ship design and safety protocols have changed, the powder-keg nature of human behavior is the same as it ever was.