She squeezed juice from several oranges.

Literal

She [topic-は] several oranges [from-から] juice [object-を] squeezed.

絞り取る (しぼりとる) means 'to squeeze out' — a compound verb of 絞る (squeeze) + 取る (extract). 数個の uses the counter 個 for several oranges. オレンジ and ジュース are both English loanwords.