Understrata
n. 底层 (understratum的变形)
🗣️ 情景例句
You can catch the ten-twenty train to Grand Central Station.
你能赶上开往Grand Central Station的十点二十分班车。
The laundry is not dry enough.
衣服还没干。
I asked a passenger if this was the Westhaven Express, but he had not even heard of it.
我问一位乘客，这是不是开往威斯特海温的那趟快车，他说从未听说过有这么一趟快车。