Keepalive message
[计] 存活报文
🧩 词语组成解析
🗣️ 情景例句
In less than two hours,
在不到两个小时之后，
Which one do you like?
你喜欢哪一个？
Are you going to be a sailor when you leave school?
你毕业后打算当海员吗？