Firewall
大学 College[计] 放火墙, 隔离
✅ 同义词
🗣️ 情景例句
doing a commercial.
正在做广告。
A clear conscience is a sure card.
光明磊落，胜券在握。
After I had sat down, he said that business was very bad.
待我坐下后，他说生意非常不景气。