mole /ˈməʊleɪ/

• 1. 

  N-COUNT A mole is a natural dark spot or small dark lump on someone's skin. 痣

  例：

  Researchers studied moles on those aged between 12 and 50.

  研究者们研究了12岁到50岁的人身上长的痣。

• 2. 

  N-COUNT A mole is a small animal with black fur that lives underground. 鼹鼠

• 3. 

  N-COUNT A mole is a member of a government or other organization who gives secret information to the press or to a rival organization. (政府或机构内的) 间谍

  例：

  He had been recruited by the Russians as a mole and trained in Moscow.

  他曾经被俄国人招做间谍，在莫斯科受训。

• 4. 

  N-COUNT a breakwater 防波堤

• 5. 

  N the basic SI unit of amount of substance; the amount that contains as many elementary entities as there are atoms in 0.012 kilogram of carbon-12. The entity must be specified and may be an atom, a molecule, an ion, a radical, an electron, a photon, etc 摩尔; 微观物质的基本物理单位