Doorstone
n. 门槛石
🗣️ 情景例句
It's time I was off.
我该走了。
Because of the type of purchase, we can only ship by road.
由于商品的性质，我方只能使用公路运输。
The temperature will stay above zero in the day-time, but at night it will fall below zero again.
白天气温保持在零度以上，但夜间仍会降至零下。