Lithostratigraphic
a. 岩石层位学的
🗣️ 情景例句
I'd love to, but I have to be up early tomorrow.
我非常感谢，可是明天我得早起。
Lightly gain,quickly lost.
来得容易去得快；不义之财，理无久享。
We spent some time looking around under the trees for some wood.
我们花了些时间在树下四周找木柴。