Precrack
[化] 预制裂纹
🗣️ 情景例句
I understand.
我明白了。
I really feel bad about it. Let me buy you a new one.
我真为这件事感到遗憾。我给你买一本新的吧。
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。