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Natural sciences
containing
problems
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progress and
problems
достижения и трудности
(
Ivan Pisarev
)
progress and
problems
достижения и задачи
(
Ivan Pisarev
)
progress and
problems
прогресс и проблемы
(
Ivan Pisarev
)
progress and
problems
успехи и проблемы
(
Ivan Pisarev
)
progress and
problems
достижения и вызовы
(
Ivan Pisarev
)
progress and
problems
достижения и проблемы
(
Ivan Pisarev
)
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