Cellon
四氯乙烷
🗣️ 情景例句
Give my best to your parents.
替我向你父母问好。
He who is afraid of asking is ashamed of learning.
害怕问者耻于学。
Libraries made education possible, and education in its turn added to libraries: the growth of knowledge followed a kind of compound interest law, which was greatly enhanced by the invention of printing.
藏书使教育成为可能，而教育反过来又丰富了藏书，因为知识的增长遵循着一种“滚雪球”的规律。印刷术的发明又大大提高了知识增长的速度。