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
Listen up.
听着。
In every rank, great or small, 'Tis industry supports us all.
不论高的低的各级人士,所持的都是勤劳。
Long ago, people believed that the world was flat.