Strlen
字符长度
🗣️ 情景例句
Very few people last in this class for the full hour the very first time.
很少人能够第一次撑完一个小时的课。
Who is this?I don't recognize your voice.
你是谁？我听不出你的声音。
Long ago, people believed that the world was flat.
很久以前人们相信地球是平的。