Keepalive message
[计] 存活报文
🧩 词语组成解析
🗣️ 情景例句
I'm madly in love with her.
我爱她爱得发疯。
Do you often do work during the holidays?
你常常在假日期间做工作吗？
he hardly ever used it, preferring always to go on foot.
但却很少使用，常常喜欢以步代车。