Cobamic acid
[化] 钴胺酸\\n[医] 钴绷酸
🧩 词语组成解析
🗣️ 情景例句
I could pay you back out of my lifeguard salary.
我可以从我当救生员的薪水中拿出来还你。
I invited him ti come down, but he wouldn't.
我请他下来，但是他不肯。
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。