( ( ( ( Magnification principles ) ( The principle ) ) ( of ( a microscope ) ) ) ( ( is ( that ( ( two ( convex ( lens systems ) ) ) ( ( are appropriately ) ( combined ( to ( magnify specimens ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (NN Magnification) (NNS principles)) (NP (DT The) (NN principle))) (PP (IN of) (NP (DT a) (NN microscope)))) (VP (VBZ is) (SBAR (IN that) (S (NP (CD two) (NN convex) (NN lens) (NNS systems)) (VP (VBP are) (ADVP (RB appropriately)) (VP (VBN combined) (PP (TO to) (NP (JJ magnify) (NNS specimens)))))))) (. .)))
Magnification principles The principle of a microscope is that two convex lens systems are appropriately combined to magnify specimens.
(ROOT (S (NP (DT The) (ADJP (RBS most) (JJ common)) (JJ two-lens) (NN telescope)) (, ,) (PP (IN like) (NP (DT the) (JJ simple) (NN microscope))) (, ,) (VP (VBZ uses) (NP (NN convex) (NNS lenses))) (. .)))