权威例句
Folding rulerFolding rulerFolding rulerLevel and angle attachment for a carpenter's folding rulerFolding rulers inside trianglesOn folding rulers in regular polygonsA ferrocene based switchable molecular folding ruler.BIOPHYSICS: A Folding RulerFolding Ruler StarFolding Ruler StarA Folding RulerMeasuring angles with a carpenter's folding rulerStimuli-responsive folding and unfolding of a polymer bearing multiple cerium(IV) bis(porphyrinate) joints: mechano-imitation of the...