The situation poses a grave threat to world peace.

这局势对世界和平造成了严重的威胁。

The result is an extremely grave threat to this culture.

结果就是，这个文明面临极为严重的威胁。

The existence of these weapons poses a grave threat to the future of the world.

这些武器的存在将对世界的未来构成严重的威胁。

However, the tiger is facing the grave threat of extinction due to illegal poaching and habitat loss.

然而，由于非法偷猎和生存地丢失，老虎也面临巨大的灭绝的危险。

The existence of the underground mined-out areas poses a grave threat to the safety of ground buildings.

地下采空区的存在严重威胁着地面建筑物和矿山的安全。