Eustasy
海面进退; 海面升降; 冰河变异
🗣️ 情景例句
Dad and I were planning to go to the game,
爸爸本来要和我一起去，
First think, and then speak.
先想后说。
I grew a beard during the trip.but I shaved it off when I came home.
我在旅行时留了胡子，但我回到家时就把它刮了。