sprocket
/spɹɒkɪt/
A toothed wheel that enmeshes with a chain or other perforated band.
(usually in the plural) The tooth of such a wheel.
A flared extension at the base of a sloped roof.
A placeholder name for an unnamed, unspecified, or hypothetical manufactured good or product.
Suppose we have a widget factory that produces 100 widgets per year, and a sprocket factory that produces 200 sprockets per year.
同義詞