Swee Lin has an interesting hobby(爱好). She collects stamps. She spends a lot of time on her stamp collection after school hours. She has collected hundreds of stamps from all over the world. They are all in color.
只要翻译:They are all in color. 这一句,最好详细分析一下in color是短语吗?
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参考资料:英汉双解词典