Ulsterian
[地质]乌耳斯特阶
🗣️ 情景例句
Do we have a bottle opener on the list, Marilyn?
清单上有开瓶器吗， Marilyn？
I will take an escalator.
我将去搭手扶电梯。
He was just falling asleep when there was a loud knock at the door.
他刚要入睡，就有人很响地敲门。