Protostratigraphy
原始地层学
🗣️ 情景例句
I agree although I still have some reservations.
我基本上同意，但仍有所保留。
What youth is used to, age remembers.
青年时经常做的事，老年时却能记得起。
During all these tests Vera was blindfold;
在所有这些实验中，维拉的双眼都是蒙着的。