根除

These insects are very difficult to eradicate.

这些昆虫很难根除。

The disease has been eradicated from the world.

这已全世界得到根除。

Despite efforts to eradicate it, corruption persists,though it doesn't accelerate.

尽管人们努力想根除腐败，但腐败现象仍存着，虽然没有恶化。