In some cases, a worm may perform an additional function outside of simple replication: it may serve as a deployment mechanism for an enclosed payload.
在某些情况下，除简单的复制功能外，蠕虫还可执行其他功能：作为一个封装的负载的部署机制。
2
It's a defense mechanism of the Christmas tree worm, most of which resides in a tunnel it carves into live coral.
这是圣诞树蠕虫的防御机制，它们中的大多数栖身在活珊瑚上挖出的“地道”里。
3
The slewing mechanism consists of hydraulic motor and worm speed reducer.