matter

n.

1. 事情；问题；事件[C]
   It was a matter of life and death for them.

   这事对他们来说是生死攸关。

2. 麻烦事，毛病[the S][（+with）]
   There's something the matter with this car.

   这辆汽车有点毛病。

3. 物质[U]
   Matter exists in three states: solid, liquid and gas.

   物质以三种形态存在，即固态、液态和气态。

4. （文章等的）素材，内容；主题[the S]
5. 事态；情势[P]
   Matters are different from country to country.

   情形因国家而异。

6. 重要性[U]