Psdn
[计] 分封交换网络
🗣️ 情景例句
the music, the concerts.
音乐，音乐会。
We are very interested in your printed pure silk scarves, could you give us some idea about your price?
我们对贵方的印花真丝围巾很感兴趣，请介绍一下贵方的价格好吗？
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。