n.[U]

1. 数学[J]
   Mathematics is her favorite subject.

   数学是她喜欢的科目。

2. 数学运算；数学应用[G]
   His mathematics are weak.

   他的计算能力很差。

pl. n.

[usu. treated as sing.] the branch of science concerned with number, quantity, and space, either as abstract concepts (pure mathematics) or as applied to physics, engineering, and other subjects (applied mathematics).