Diamond is the hardest substance known. 鉆石是已知物質(zhì)中最硬者。
But aerogel is able to slow the particles down to a halt within the space of a few dozen microns, and preserve them better than any known substance. 但是氣凝膠能夠讓這些顆粒減速并最終在幾十微米的距離上停下來(lái)，比其他任何已知物質(zhì)更好的保護它們。
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