English version

keep a weather eye on something

From Longman Dictionary of Contemporary Englishkeep a weather eye on somethingkeep a weather eye on somethingWATCHto watch a situation carefully so that you notice anything unusual or unpleasant Keep a weather eye on your finances. weather
Examples from the Corpus
keep a weather eye on somethingThey dabble in composites, and keep a weather eye on the developments made by the small specialists.Both, for different reasons, kept weather eyes on the cloning work.This lets you keep a weather eye on your finances.
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