单词	rotor
释义	rotorrotor /ˈroʊt̮ɚ/ noun [countable] technical Etymology ETYMOLOGYrotor Origin: 1800-1900 rotator something that rotates (17-21 centuries), from Latin, from rotare; ➔ ROTATE 1 a part of a machine that turns around on a central point2 (also rotor blade) the long flat part on top of a helicopter that turns around and around
随便看	Oppenheimer, J. Robert opponent opportune opportunely opportunism opportunist opportunistic opportunistically opportunity opportunity cost opposable thumb oppose opposed opposing opposite opposition oppress oppressed oppression oppressive oppressively oppressiveness oppressor opprobrious opprobriously

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