用acrobat export 导出就行了，不过如果原材料已经是pdf那就没办法了。
黑白版本
弄好了，上传了。
非常感谢！
谢谢欣赏好资源，好东西就要好好分享！
感谢M兄的优化制作！
目前的版本6052页分辨率是较低的，比较模糊。看到这个帖子里kadioguy兄提供了6052页的高清原图，可否考虑更新一下呢：
确实可以，多谢
Could anyone please repack this addition?
I’m afraid that the mdx owner would not repack for a single page. Still, you can just simply put the clear page in the mdx folder and rename it as YHCH_6052.png, then the dict software will prefer the clearer one you add.
I downloaded the two zip file from amob that contain the dictionary, i could only extract the first one which gave me mdx file. I assume the other zip file has mdd or maybe css aswell But I can’t extract that one…
Perhaps you shall download zip files and try one more time, make sure 2 zips are in the same folder and extract the first one, then 2 zips would be extracted as a whole.
更新了mdd还加了原高清彩色pdf（体积够大）喜欢纸质色泽和质感的可以browse
原来的#9楼百度链接我没法改动了，新的链接
链接: https://pan.baidu.com/s/1EURZhHUlcajC6s1cdQ84QA?pwd=ffia
改动文件：
英汉辞海 [高清非切图]-original.pdf 英汉辞海 [高清非切图]-bitonal.mdd
多谢，辛苦了。
Wow thank you so much! Could anyone please add to another source for non Chinese mainland users?
Here:
PDF 20gb too large to fit.
Thank you so much I really appreciate you for taking time to upload this! From my understanding, dictionary can be used without pdf file?
Try and find out. It is self-evident.
Okay. I only ask because of limited mobile data plan. Thank you again 