Bedeutung von “therefore” — Learner’s Dictionary

therefore

adverb us uk /ˈðeəfɔːr/
Therefore, most experts predict that nuclear power will become increasingly important.Average monthly temperatures therefore do not change much during the year.Scientists have therefore concluded that the drug is not safe.It is therefore helpful to fill in the form before you arrive.You must therefore be careful to ensure the fire is properly extinguished.

B1 for that reason:

The region has suffered severe flooding and tourists are therefore advised not to travel there.

(Definition von “therefore” aus dem Cambridge Learner's Dictionary © Cambridge University Press)