But in the late nineteenth century, that panoply of possibilities began to fall away with the arrival of a totally new kind of material - celluloid, the first man-made plastic.
但到了十九世纪末，那种盛况随着一种全新材料的兴起而衰落，这就是赛璐珞，第一种人工合成的塑料。
2
The experiment could open the door to production of artificial organisms whose original genetic material is replaced entirely by man-made DNA, the researchers said.
研究人员称，这项试验打开了一扇门，可以用人造dna完全替换细菌原有的遗传物质制造出人工生物体。
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This new man-madematerial feels like real leather.