【New words and expressions 生词和短语】

mineral adj. 矿物的

boring n. 钻孔

derrick n. 井架

block and tackle 滑轮组

haul v. 拖，拉

rotate v. 使转动

cutting bit 钻头

geologist n. 地质学家

coring bit 取芯钻头

cylinder n. 圆柱体

strata n. 岩层[复]([单]stratum或strata [误用])

circulate v. 注入，环流

gusher n. 喷油井