Sanger
桑格(①姓氏 ②Frederick, 1918-, 美国生物化学家, 曾获 1958年诺贝尔化学奖)
🗣️ 情景例句
I have spent the last five years working specifically in this field.
过去五年我专门在这个领域里工作。
But you just got here. Can't you stay a little longer?
不过你刚来呀。不能再呆一会了吗？
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。