Anthracolitization
煤化作用
🗣️ 情景例句
that will bring parents and teachers together once a week
让家长们及教师每星期一次
Alone, he brooded over his mistake.
她常常独自沉思自己的过失。
who put his questions to nature instead of to the ancients,
他向自然界而不是向古人提出问题，