Microfilms
n. （拍摄文件等用的）缩微胶卷( microfilm的名词复数 )
🗣️ 情景例句
you know how Dad is always talking about
知道爸爸时常谈起
Experience must be bought.
若要得经验，必须化代价。
In this way, we have learned all that we know of the laws of astronomy,
例如，用这种方法，我们完全掌握了天文学的规律。