Concentration limit
[化] 浓度极限
🧩 词语组成解析
🗣️ 情景例句
so why don't we get right to work?
我们现在就开始工作， 好吗？
What track does the Metroliner leave from?
华纽特快从第几轨道开出？
I've been working so hard recently that I haven't had any time for collecting new stamps.
最近我的学习一直很紧张，没有时间收集新邮票。