So far the drilling has only been exploratory, but the prospects look good.

到目前为止这种钻探仅仅是探索性的，但是其前景很看好。

youdao

So far the drilling has only been exploratory, but the prospects look good.

到目前为止这种钻探仅仅是探索性的，但是其前景很看好。

youdao