higher term的用法和样例：
例句
- The higher orders were retained as an infinite sum of standing eigen-waves to deal with the fields inside the grooves.
其中对槽区内的场处理，保留其高次项，表示为一无限本征驻波之和的形式。 - We propose adding a term that is related to the fourth power of offset into the traveltime equation, and expressed it by a fraction expansion.
为此，在时距关系中增加含炮检距的四次项，并采用分式展开法表示该四次项，同时引入远偏移距收敛因子。
