Sacc
[医][=short arm cylinder cast]短臂柱样模型，短臂管筒石膏，短臂柱样管型
🗣️ 情景例句
Wrap him in the blanket, Dad!
用毯子把他裹好， 爸爸！
How do I say this?
怎么说？
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。