Substr
n. [数]子串函数；[数]字符截取函数；[数]取字符串的子串
🗣️ 情景例句
My father sends his regards to you.
我父亲向你问好。
If I get my work finished in time,I'll leave for New York Monday.
如果我把工作及时完成了，我将星期一去纽约。
But the historian attempting to reconstruct the distant past is always faced with a difficult task.
但是，历史学家企图重现遥远的过去可是一项艰巨的任务，