Collinite
凝胶煤素质; 无结构腐殖体
🗣️ 情景例句
Marilyn, I have to tell you something.
我得告诉你， Marilyn
He was anxious about his son's safety.
他担心他儿子的安全。
We resolve to get up earlier each morning,
我们决心每天早晨起得早些；