1. | 鼹鼠（体小，视力极差，居住在挖掘的地道）a small animal with dark grey fur, that is almost blind and digs tunnels under the ground to live in |
2. | 色素痣a small dark brown mark on the skin, sometimes slightly higher than the skin around it |
3. | 间谍；内奸a person who works within an organization and secretly passes important information to another organization or country |
4. | 摩尔（计量物质的数量单位）a unit for measuring the amount of substance |
