单词	mobius strip
释义	Mobius Strip A special surface with only one side and one edge. You can make one with a paper strip: give it half a twist and then join the ends. Things to try: • draw a line along the middle, you will find the line continues on behind where you started and then comes back to the start again! • try cutting it along the middle line, what do you get? • Make another one and try cutting it near the edge (1/3rd width, or 1/4 width) and see what happens. They are also useful! In a machine with a moving belt it can help spread the wear so it lasts longer.
随便看	elimination ellipse ellipsoid end point engineering notation enlarge equal equal sign equality equality (sets) equation equation of a straight line equiangular triangle equidistant equidistant points equilateral equilateral triangle equinox equity equivalent equivalent fractions error estate estimate estimation

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