Patmo
abbr. Patent and Trademark Office 专利与商标办事处
🗣️ 情景例句
but this is an important opportunity.
但这是一次很重要的机会。
You have your point of view,and I have mine.
你有你的观点，我有我的。
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。