This is positively the worst thing that I can even imagine.

这确实是我能想象到的最糟糕的事情。

This is positively the last chance for the industry to establish such a system.

这绝对是该产业建立这样一个体系的最后机会了。

He's changed since he came back — he seems positively cheerful.

他回来后变了个样，看起来确实很高兴。

Parents are positively encouraged to be at school whenever possible.

我们非常鼓励父母无论何时，只要可能就去求学。