这意味着路由器在收到数据封包时就会去除以太网的数据头信息，加上低一层的数据头信息(以太网层或者其他层的)，然后发送给下一方。

This means that routers strip off the Ethernet header upon reception of a packet, and then add a new lower layer header-ethernet or otherwise-when the packet is forwarded.

youdao

他的头低倒着。他想的是平民和帝王。袁水。

His head is bowed. He thinks of men and Kings.

youdao

小心，别(让这根低梁)撞着头。

Mind you don 't knock your head (on this low beam).

youdao