Leftmost substring
[计] 最左子串
🧩 词语组成解析
a. 最左边的
[计] 子串
🗣️ 情景例句
He is working on a book about the Vietnam War.
他正在写一本关于越战的书。
To run into
碰撞
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。