sprocket
n
1 each of several teeth on a wheel that connect with the links of a chain or the holes in a film or in paper or magnetic tape 链轮齿.
2 (also `sprocket-wheel) such a wheel, eg on a bicycle 链轮. =>illus at App 1 见附录1插图, page xiii.
🗣️ 情景例句
Everything smelled so special.
所有的东西都有一股特别的味道。
Water dropping day by day wears the hardest rock away.