堆沙蠕虫分泌出一种胶状物将沙石粘合在一起形成壳装，这一点类似于淡水石蛾的幼虫。
Instead, it secretes a glue and USES this to stick bits of sand together to form its casing, in the way that a freshwater caddis fly larva does.
然后，她们把这些五颜六色的花瓣一层一层叠成茧状，偶尔会用点花蜜来粘合。
She then shapes the multi-colored petals into a cocoon-like structure, laying one petal on top of the other and occasionally using some nectar as glue.
整形外科医生都知道，这一点是必须的，因为骨头碎片粘合时如果出现几毫米的缝隙，伤口将不会愈合。
That is necessary, as any orthopaedic surgeon knows, because if a gap of more than a few millimetres is left between fragments the bone will never heal.
应用推荐