gōngchéngduì / bǎ / zuāntànjī / yùn / dào / shānjiǎo / zhǔnbèi / kānchá / dìxià / yáncéng

工程队把钻探机运到山脚，准备勘查地下岩层。

The engineering team transported the drilling machine to the foot of the mountain to survey the underground rock layers.