Adopting sand pile, plaster pile and cement pile and etc to deal with soft and weak foundation which becomes compound foundation is a common method in foundation treatment.

采用砂石桩、土桩和水泥土桩等处理软弱地基，形成复合地基，是地基处理中常用的一种方法。

It is quite common that in vocational colleges students have a weak foundation in English, while the assigned teaching period is insufficient for the huge programme of English teaching.

高职英语教学存在着学时少、任务重、学生英语基础差的状况。