Keepalive message
[计] 存活报文
🧩 词语组成解析
🗣️ 情景例句
Ten o'clock.
十点钟。
Each single crate is heavily padded and packed with 4 carboys.
每只木条箱内装4只大瓶子将空余处填满。
If you learn even a little English, you will find it usedful after you leave school.
假如你哪怕只是学一点英语，毕业后，也会发现它是有用的。