投了Metallurgical and Materials Transactions B，接受了，然后邮件是这样：
To help offset the expenses associated with journal publishing, TMS collects voluntary page charges ($70 per published page) for this journal. If your research is supported through grants or other means of funding, please consider supporting the publication of your work by completing the page charge form that will be provided to you by TMS when your article has been assigned to an issue.

You will receive proofs electronically from Springer. Please make arrangements for handling the proof review if you expect to be away from your office.
这种情况是不是要交版面费呢？“TMS collects voluntary page charges”这个自愿费用又是什么意思啊？没遇到过这种情况，大家帮忙看看、 返回小木虫查看更多