crustose lichen（壳状地衣）是什么意思？音标发音+图解场景

壳状地衣 /ˈkɹʌʃə/ n

English: crustose lichen · 壳状地衣

释义：Lichen whose thallus forms a crust that is firmly attached to its substrate.

这个词出现在以下图解场景（1）