I have told them with absolute certainty there'll be no change of policy.

我十分确定地告诉他们政策不会有变。

A general election became a certainty last week.

普选在上周已成必然。

the certainty of more violence and bloodshed.

必然会发生更多的暴力和流血事件。

There are no certainties in modern Europe.

现代欧洲无定事。