Phonmeter
n. 测音器, 音波测定器
🗣️ 情景例句
Always remember to wash your hands before eating.
用餐前谨记要洗手。
The college was established in 1940.
该学院建立于1940年。
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。