quarrying
露天開採; 採掘; 採石; 拔蝕作用
Quar·ry, v. t. [imp. & p. p. Quarried p. pr. & vb. n. Quarrying.] To dig or take from a quarry; as, to quarry marble.
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quarrying
n : the extraction of building stone or slate from an open
surface quarry