New words and expressions 生词与短语

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

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