speck

1. N-COUNT A speck is a very small stain, mark, or shape. 污点; 斑迹[oft N 'of' n]

He has even cut himself shaving. There is a speck of blood by his ear. 他甚至在刮脸时划伤了自己。他耳边有一点血迹。

2. N-COUNT A speck is a very small piece of a powdery substance. (粉状物的) 微粒[oft N 'of' n]

Billy leaned forward and brushed a speck of dust off his shoes. 比利俯身刷掉鞋上的一点灰尘。