| 单词 | sprocket |
| 释义 | Word Frequency sprocket(ˈsprɒkɪt) noun 1. Also called: sprocket wheel a relatively thin wheel having teeth projecting radially from the rim, esp one that drives or is driven by a chain 2. an individual tooth on such a wheel 3. a cylindrical wheel with teeth on one or both rims for pulling film through a camera or projector 4. a small wedge-shaped piece of wood used to extend a roof over the eaves Word origin C16: of unknown origin |
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