Once children become capable of answering such questions as "what does it mean to remember?” and "what does it mean to know something?” improvements in memory seem to occur.
2
问：如果网站宣称一张图片或一份文档是在公共域内的，那是什么意思？
What does it mean when a Web site says a picture or document is in the public domain?
3
问：如果网站宣称一张图片或一份文档是在公共域内的，那是什么意思？是否意味着它可以为我所用？
What does it mean when a Web site says a picture or document is in the public domain? Does that mean I can use it for my own purposes?
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