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


,
是范艾克便可以在
子
描画。
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堂 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.
具有讽刺意味的是,扎克曼
授使用这本传
士的词典并不是为了传播

和英语,而是为了拯救一种濒临消亡的土著语言,所以他称之为“颠倒的过程”,意思是倒过来。