distill

他们将玫瑰花瓣蒸馏制成精油。

They ___distill rose petals to make essential oil.

那位年迈的学者花了十五年时间，将几个世纪的军事史浓缩成了一本简洁的手册。

The aging scholar spent fifteen years ___distilling centuries of military history into a single concise handbook.

滨海炼油厂的工程师们昼夜不停地将进口原油蒸馏成汽油、柴油和航空燃油。

Engineers at the coastal refinery ___distill imported crude into gasoline, diesel, and jet fuel around the clock.