Prestratigraphy
前地层学
🗣️ 情景例句
The wind's really howling today.
今天风刮的真凶。
I don't think it's four o'clock yet.
我认为现在还不到四点。
If we could actually see the path described by a particle,such as a sand grain in the rock,
假如我们真能看到的运动轨迹，诸如岩石中一个沙粒分子