excation

常见例句

The serious hydrocele of the excation might conduce the working face or livelong minesubmerged, So need use many ways to detect the hydrocele of the excavation.
采空区积水严重时,会导致工作面以至整个矿井的淹没,因此,必须正确运用多种方法探测采空区积水,解除水患。
Hard work is not something that you can do when you "get around to it".To be benefical,it must bu regular,excat and rewarding.
艰难的工作不是随意应付就可以的，要做出成效，就必须持之以恒、不折不扣，并有回报。