Ulsterian
[地质]乌耳斯特阶
🗣️ 情景例句
How can I thank all of you?
我该如何感谢你们呢？
When does it get there?
什么时候到那里？
As it is, they have been drilling for sixteen hours and they still have a long way to go.
实际情况是，他们已连续钻了16个小时了，但离钻透还早着呢。