vt.包封；遮盖；包围
The papers are enveloped by plastic bag. 论文用塑料纸包封好了。
Gloom enveloped the household. 沮丧的气氛笼罩著这一家子。
The mountain peak was enveloped in mist and clouds. 山峰被云雾遮蔽。
n.信封；壳层；封袋
adj.被包围的
动词envelop的过去式和过去分词形式.
包络线
n.封套
名词envelop的复数形式.
