Ercs
abbr. emergency rocket communications system 紧急火箭通讯系统
🗣️ 情景例句
We should have done it sooner.
我们早就该取下来的。
Can I have a second-class one way ticket to Chicago,please?
请给我一张去芝加哥的单程二等票好吗？
Ethanol is more effective at a concentration of 50-70 percent;
乙醇的浓度为50％至70％时比较有效，