因此，考虑的所有这一切，我想提出一项建议：现在到了需要一个新的标志性形象的时刻了，来纪念我们在精神上成为人类。
So with all of this in mind, I'd like to make a proposal: it's time for a new iconic image of the moment we became human.
而其他的各种精神药物都是“化学合成”(基于药理学合成)，它们需要通过现代的化学技术进行制造，因此，人类服用这些化学合成药物的历史更为短暂。
Other psychoactive drugs are "chemical" (pharmacological); they require modern chemistry to manufacture, and are therefore of much more recent origin.
科学不仅仅是一种自然知识体系或满足人类生存需要的工具，而且还代表了一种崭新的精神、一种独特的文化，即科学文化。
Science is not only the kind of knowledge system of nature and the instrument of human being, but also stands for the kind of new spirit and the unique culture, that is science culture.
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