英译:在这个特别时期,全世界人民应该团结起来`

这句比较地道,是BBC广播里的,
At this very moment,people around the world should be unite.
在国外,"非常时期"一般都用"very moment".
"团结起来"只用一个"unite"就行,简练.

at this very moment, people all over the world should unite together.

During this special period, people throughout the world should hold up together!

At this special time, people of the world should be one union.