Security maintenance
[计] 安全维护
🧩 词语组成解析
🗣️ 情景例句
Whatever you do, though, Ellen.
尽管如此，爱伦，无论你怎么决定。
So let us all welcome him to the podium.
让我们欢迎琼斯先生上台演讲。
It was from the study of these that so much was learnt about the interior of the earth.
正是从这两种波的研究中，我们可以了解到地球内部的许多情况。