up-and-down
下行链路
down link【通信】;down-chain【通信】
暂无补充释义。
相关词条
fill down
sit-down
Chinese grey duck down
breaking-down test
let someone down; cut the ground from under someone's feet
duck down
buckle down to
down link【通信】;down-chain【通信】
暂无补充释义。
up-and-down
fill down
sit-down
Chinese grey duck down
breaking-down test
let someone down; cut the ground from under someone's feet
duck down
buckle down to