私たちは科学プロジェクトに必要なすべての材料を集める必要があります

Meaning: we need to gather all the necessary material for the science project

私: i, my, me, i am, myself, private
たち: we, their, ours, -s, group of
は: a, the, is, am, are, will
科学: science, scientific
プロジェクト: project, plan, program, scheme
に: in, to, on, at, into, upon
必要: need, have, necessary, needed, required, must, want, essential, necessity, indispensable
な: a, the, na, nan, nai
すべて: all, every, everything, entirely, completely
の: to, of
材料: material, ingredient, ingredients, materials, stuff
を: o, the, to, wo
集める: collect, gather, to collect, to gather, attract, assemble, muster, garner
必要: need, have, necessary, needed, required, must, want, essential, necessity, indispensable
が: is, there, but, ga, will, however
ある: a, is, an, be, there is, to be, locate
ます: will, to be, i will, to make, to do, to have