When fresh, it is perfectly white and delicious, but, because most of the wounds on which it is found have been made by fire, the exuding sap is stained on the charred surface, and the hardened sugar becomes brown.

新鲜时，它洁白可口，但由于发现它伤口大多过，渗出汁液沾染在焦，硬化糖变成褐色。

Figure 10 shows that the longitudinal settlement of the tunnel vault in case 1 increases slightly after surface hardening, but the nonuniform settlement of the tunnel vault has been greatly improved.

图 10 显，硬化后，情况 1 中隧道拱顶纵向沉降略有增加，但隧道拱顶不均匀沉降得到了很大改善。

After surface hardening with a 20-cm-thick layer of C20 concrete, the surface settlement is effectively controlled, and the uneven longitudinal settlement of the tunnel vault is improved.

用 20 cm 厚 C20 混凝土层进行硬化后，沉降得到有效控制，改善了隧道拱顶不均匀纵向沉降。