Question

aerogel
aer.o.gel  AHD[âr“…-jµl”]   DJ[6e*r*7d/el]  KK[6Wr*7d/Wl]
n.（名词）
    A highly porous solid formed from a gel, such as silica gel, in which the liquid is replaced with a gas.
    气凝胶：由凝胶（如硅胶）形成的高渗透性固体，其内部的液体被气体取代