“突起物”造句
想法 二: 雪橇撞到地面
突起物时,凯萨琳掉下来了.
Idea 2 : Kathleen falls off the sled when it hits a bump.
在开采洞穴时,你必须要戴上安全帽,以防止头部撞到
突起物,或者被掉落的岩石砸伤.
You should wear hard hats when caving to protect the head from bumps and falling rocks.
息肉: 具黏膜的腔壁上形成的
突起物.
Polyp: Growth projecting from the wall of a cavity lined with a mucous membrane.