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Observation Definition & Meaning - Merriam-Webster
OBSERVATION | definition in the Cambridge English Dictionary
OBSERVATION | English meaning - Cambridge Dictionary
OBSERVATION Definition & Meaning | Dictionary.com
Observation - Wikipedia
Observation - Definition, Meaning & Synonyms | Vocabulary.com
Observation beyond our eyes - Understanding Science
observation - Oxford Learner's Dictionaries
Observation Definition & Meaning | Britannica Dictionary
observation noun - Definition, pictures, pronunciation and usage …
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