Keepalive message
[计] 存活报文
🧩 词语组成解析
🗣️ 情景例句
Here they are. Family Album, U.S.A.
就在这里。美国写真！
A fool and his money are soon parted.
笨蛋难聚财。
The children were leaving school on Tuesday when they saw a truck.
星期二，孩子们正放学回家，这时，他们看见一辆卡车。