noun 下载 🔗分享 矿井,竖井 A vertical hole through the strata to reach the mineral which is being mined. Examples : "The old mineshaft, now fenced off, was a deep, dark hole leading down to where they used to dig for coal. " 那个被栅栏围起来的旧矿井竖井,是个深不见底的黑洞,通向他们过去挖煤的地方。 geology industry structure building technical work 与AI对话词汇游戏阅读练习