Katrina studied the russian language in high school. although not fluent, she did accumulate a large vocabulary. years later, she decided to go to russia, so she wanted to brush up on her vocabulary. she picked up the vocabulary much more quickly because it is easier to ; that is, to learn the material for a second time.

relearn

Explanation:

According to my research on studies conducted by various neurologists, I can say that based on the information provided within the question she picked up the vocabulary much more quickly because it is easier to relearn; that is, to learn the material for a second time. This is because most of the information is already stored in the brain and it just takes certain familiar stimulation to recall that information once again.

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i honestly speaking this is too long

the answer is true .