speck [spɛk]

例句:

• Billy leaned forward and brushed a speck of dust off his shoes.
  比利俯身擦掉了鞋子上的一丝灰尘。
  
• The ship was now just a speck in the distance.
  此时，那艘船不过是远处的一个小点。
  
• I've got a speck of dirt on my shirt.
  我的衬衫上有一点污垢.
  
• Where did that 'tiny subatomic speck of space' originate?
  来自SA
• The earth is a small speck in an unimaginably vast universe.
  来自SA
• The speck of rock was spotted by the Hubble space telescope.
  来自VOA