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	bachelor's degree Bach, Johann Sebastian bacillus back backache back-alley backbacon backbiter backbiting backboard backbone backbreaking back country backcourt backdate backdoor back door backdrop -backed backer backfield backfire back formation backgammon background

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