nguyên lý bảo toàn vật chất 
principle of conservation [ nguyên ] : acting, holding a post temporarily; to be intact, unaltered, brand new, original; in full; all, whole, entire
[ lý ] : physics; reason, principle, law
[ bảo ] : (1) to say, order, tell (someone to do something); (2) to insure; (3) to protect, guard; (4) precious, valuable
[ toàn ] : all, entire, whole
[ vật ] : (1) thing, object, creature, being; matter, body; (2) to slam (wrestling), wrestle, toss; (3) do not ~!
[ chất ] : matter, material, substance, matter, agent
Most Common Compounds Set 1:
Most Common Compounds Set 2 :