Bibliometer
吸水性能测定仪
🗣️ 情景例句
I was just waiting for you to get home
我正等你回来，
I would like to suggest that we take a coffee break.
我建议我们休息一下喝杯咖啡。
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。