Metacode
[计] 元代码
🗣️ 情景例句
We really appreciate your advice.
我们非常感谢你的建议。
We know not what is good until we have lost it.
有的时候不爱惜，失了以后空叹息。
and you avoid the frustration of arriving at the very moment when the train is drawing out of the station and being unable to get on it.
而且可以避免那种正好在火车驶出站时赶到车站，因上不去车而感到的沮丧。