During the Information age, the wide application of multimedia net technology has opened up a brand new field for computer-assisted language learning (CALL).
身处信息时代，多媒体网络技术的广泛应用为以计算机为依托的辅助教学(CALL)开拓了一片崭新的天地。
With the development of high technology, Multimedia technology has penetrated into every field.
随着高科技的飞速发展，多媒体技术已经渗透到了各个领域。
So the digital image compression technology and the digital image encryption technology have been born and applied in many field, such as multimedia, communication, medicine and so on.
数字图像压缩技术和数字图像加密技术应运而生，并且被广泛应用到多媒体、通讯、医学等等各个领域。
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