A concave mirror would project a real inverted image of the silverpoint onto the panel, which van Eyck would trace.
凹面镜把颠倒

投射到木
上,于是范

可以在
子上描画。
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What's ironic is that Professor Zuckermann used the missionary's dictionary not to spread Christianity and English, but to save an Aboriginal language from extinction, so he calls it 'topsy-turvy', meaning upside down.
具有讽刺意味的
,扎克曼教授使用这本传教士的词典并不
为了传播基督教和英语,而
为了拯救一种濒临消亡的土著语言,所以他称之为“
倒的过程”,意思
倒过来。