不断升级的冲突正威胁着整个地区的稳定。

The escalating conflict ___threatens the stability of the entire region.

工业污染严重威胁着这条河流脆弱的生态系统。

Industrial pollution severely ___threatens the fragile ecosystem of the river.

如果不采取紧急行动，海平面上升将威胁全球许多沿海城市。

Rising sea levels will ___threaten many coastal cities worldwide without urgent action.