单词	cylinder
释义	cylindercylinder /ˈsɪləndɚ/ ●●○ noun [countable] Etymology ETYMOLOGYcylinder Origin: 1500-1600 Latin cylindrus, from Greek, from kylindein to roll 1 math, geometry a shape which has two circular ends and straight sides2an object or container such as a can which is in the shape of a cylinder:  a cylinder of oxygen3the tube within which a piston moves forward and backward in an engine:  a four-cylinder engine4run/hit/fire on all cylinders to operate or perform very well:  When we’re hitting on all cylinders, we’re hard to beat. [Origin: 1500–1600 Latin cylindrus, from Greek, from kylindein to roll]
随便看	producer cooperative product production production line production number production platform productive productive capacity productively productiveness productive resources productivity product market product mix product placement prof profanation profane profanely profanity profess professed professedly profession professional

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