scientific organizations established in the 20th century يبدو
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كلمة بكلمة
- scientific يبدو
- organizations يبدو
- established يبدو
- in يبدو
- the يبدو
- 20th يبدو
- century يبدو
- scientific organizations established in the 20th century معنى: منظمات علمية تأسست في القرن 20
