A whale surprises researchers with her journey.
Surprise someone with is a good example of how to use easy word to express ideas properly. Sometimes we may think of sentences with complex structures rather than simple ones like this.
A lone humpback whale travelled more than 9000 kilometers from breeding areas in Brazil to those in Madagascar, setting a record for the longest mammal migration ever documented.
setting a record for ...
I try to learn this phrase by making another sentence like "Personal automobiles in Chengdu has reached the number of ***, setting a record for a city with the third largest percentage of personal automobiles of all China."
ever documented
Here the noun alternates to a verb in its passive tense, which clearly demonstrates the thing happens now is real and believable.
those
This way of mentioning a previous noun could be easily ignored by Chinese writers like me.