Despite the invention of synthetic rubbers, there is often no good substitute for the real thing, for nothing artificial yet matches natural rubber's resilience and strength.
尽管人类发明了合成橡胶，但现在没有能替代天然橡胶的好产品，因为人工合成橡胶弹力和强度还无法和天然橡胶相比。
It was a natural object, it was nothing artificial.
这是个自然天体，不是人造的。
It was a natural object, it was nothing artificial.
这是个自然天体，不是人造的。
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