Vacuum test
[化] 真空检验
🧩 词语组成解析
🗣️ 情景例句
We're happy you got the promotion.
很高兴你得到了提拔。
What is one man's cloud is another man's sunshine.
此人乌云盖顶，彼人艳阳满天。
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。