encrust

vt.用一层硬壳覆盖，包裹；（用贵重物品在）表面装饰

vi.结壳，形成硬壳

网络解释.包外层；用一层硬壳覆盖；包外壳；长壳

词形变化:

过去式：encrusted 过去式：encrusted 过去式：encrusting 过去式：encrusts