优点在于：结构简单，使用方便，将多色笔和随身碟的功能结合为一体，适用范围广，实用性强。
The advantages are: simple structure, easy to use, integration of multicolor pen and portable disc, wide application and high practicability.
优点在于：结构简单，使用方便，将多色笔和随身碟的功能结合为一体，适用范围广，实用性强。
The advantages are: simple structure, easy to use, integration of multicolor pen and portable disc, wide application and high practicability.
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