Understrata
n. 底层 (understratum的变形)
🗣️ 情景例句
You really must have your wits about your when dealing with such people.
跟这类人打交道，你必须格外警觉。
What's your point of view?
你的观点是什么？
We may have to back order three items on this order.
这次订的货有三个项目必须要晚点才能交货。