All of this can be done, Mr Heydon believes, for about half as much as opening a new landbased mine.

海登相信，只要花费相当于一个陆地矿井一半的费用，所有这些就都可以实现。

youdao

All of this can be done, Mr Heydon believes, for about half as much as opening a new landbased mine.

海登相信，只要花费相当于一个陆地矿井一半的费用，所有这些就都可以实现。

youdao