Orthopyroxene
斜方辉石类
🗣️ 情景例句
I would not have missed this get-together for the world!
世界上任何事情都阻止不了我来参加这次聚会！
Could all of you take your seats? We need to continue our meeting.
请你们各位就坐好吗？我们要继续开会了。
and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.
我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。