单词	trapezoid
释义	trapezoidtrapezoid /ˈtræpəzɔɪd/ noun [countable] Etymology ETYMOLOGYtrapezoid Origin: 1700-1800 Modern Latin trapezoïdes, from Greek, trapezium-shaped, from trapeza; ➔ TRAPEZIUM math, geometry a flat shape with four sides, of which only two are parallel
随便看	ringleader ringlet ring magnet ringmaster Ring of Fire, the ringside ringworm rink rinky-dink rinse Rio de Janeiro Rio Grande, the riot rioter riot gear rioting riotous riotously riotousness riot police RIP rip riparian ripcord rip current

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