科学家根据颜色将这些蝴蝶分类。

Scientists ___classify these butterflies based on their colors.

这些文件被军方列为机密，只有高级官员才能查阅。

The military ___classified these documents, restricting access to top officials only.

图书馆把这本书归类为科幻小说。

The library ___classified this book as science fiction.