随着网络的发展，目前很多人给亲朋好友发电子贺卡。请根据以下提示，阐述电子贺卡的优越性。
1．可播放动画和声音；
2．传递速度快。
3．形式多样，还可自己设计。
4．有利于保护环境。
注意：文章包括以上要点，可适当发挥，不要逐条翻译。
词数：100—120字
参考词汇：电子贺卡：electronic card; 动画：animation
随着网络的发展，目前很多人给亲朋好友发电子贺卡。请根据以下提示，阐述电子贺卡的优越性。
1．可播放动画和声音；
2．传递速度快。
3．形式多样，还可自己设计。
4．有利于保护环境。
注意：文章包括以上要点，可适当发挥，不要逐条翻译。
词数：100—120字
参考词汇：电子贺卡：electronic card; 动画：animation
With the development of Internet, more and more people tend to send electronic cards instead of paper ones.
Compared with the traditional cards, electronic cards are more interesting and lively, for you can get not only pictures but also sound and even animations. Besides, it’s faster to send an electronic card. There are many websites on line where different varieties of cards are available.
If none of these cards are of any interest to you, you can design cards of unique style using FLASH or other software. More importantly, with the popularity of electronic cards, less paper is used for making paper cards, which contributes to the environment protection.