好像里面说，不是强制性收的，也不是出版的先决条件，是不是这样的？
Page Charges. If your publication is one of these, it is your
company or institution, not you, which is being asked for
support. Payment is not obligatory nor is it a prerequisite
for publication.
[ Last edited by p1801321 on 2010-11-24 at 18:36 ]
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