| 释义 |
known substance
基本例句
已知物,已知物质
Diamond is the hardest substance known.钻石是〈已知物质〉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 anyknown substance.但是气凝胶能够让这些颗粒减速并最终在几十微米的距离上停下来，比其他任何〈已知物质〉更好的保护它们。 |