Phthioic acid
[化] 结核菌酸\\n[医] 结核菌酸
🧩 词语组成解析
🗣️ 情景例句
That's a nice age. What's her name?
正是美妙年龄。她什么名字？
He is unfortunate who cannot bear misfortune.
不能承受不幸的就是不幸。
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。