该地区长期采矿,导致地下水位下降和地表塌陷。Gāi dìqū chángqī cǎikuàng, dǎozhì dìxià shuǐwèi xiàjiàng hé dìbiǎo tāxiàn.Long-term mining in the region has caused groundwater levels to fall and the ground surface to collapse.
爷爷年轻时在山里采矿。Yéye niánqīng shí zài shān lǐ cǎikuàng.Grandpa worked in a mine in the mountains when he was young.
采矿工人下井前都要戴好安全帽。Cǎikuàng gōngrén xià jǐng qián dōu yào dài hǎo ānquánmào.Miners always put on their safety helmets before going down the shaft.