Thatkindofshoesare__________expensiveforme.
Theyare__________amassproductionmovement.
Thereisa(n)__________betweenlogicandmetaphysics.
必要的;基本的adj.要素,要点n.e_______________
Einstein’snewtheoryonopticschanged__________scientificideaaboutlight.
视力;洞察力n.v_______________