1.It was difficult to study because the fish is encased in rock.
encase 包住
When nuclear fuel is manufactured it is encased in metal cans.
核燃料生产出来后被装在金属罐中
。2.They used the X-ray machine to "digitally dissect" the fish.
dissect 仔细分析
Her latest novel was dissected by the critics.
评论家对她最近出版的一部小说作了详细剖析
。