您要查找的是不是：
- 第n阶振型不平衡谐量n-th nodal unbalance
- 阶乘factorial
- 第几which
- 色阶color gradation
- 及第pass an imperial examination
- 一阶single(-)order
- 勃艮第burgundy
- 阶数exponent number
- 落第fail in an imperial examination
- n阶谓词n-adic predicate
- 开往布赖顿市的火车在第几站台?Which platform does the Brighton train leave from?
- 低阶low level
- 第n项n th term
- 一阶导数first derivative
- 灰阶gray scale
- 第n偏商n th partial quotient
- 第n-性质exchange ring
- n阶n-order
- 第N方物流n party logistics
- n阶差分difference of nth order
