Significado: aerial observation 
observación aérea (observación llevada a cabo desde el aire, desde una aeronave)
observa Idioma
keep under observation
The police keep all habitual criminals under observation from the day they leave the prison．所有贯犯自出狱那天警察就密切注视他们。
2．watch or study attentively 注意观察；研究
The doctor cannot understand Jane's stomach trouble，and he wants to keep her under observation for a few days．大夫搞不清简的胃有什么毛病，于是想把她留在医院里观察几天。
An observa idiom dictionary is a great resource for writers, students, and anyone looking to expand their vocabulary. It contains a list of words with similar meanings with observa, allowing users to choose the best word for their specific context.
Diccionario de palabras similares, Sinónimos, Diccionario Idioma observa
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