登机口的英文：
a boarding gate

参考例句：

Gate;departure gate
登机口

Listen to the following boarding calls and write down the correct flight number, destination and gate below.
听下面的登机广播，写出正大铁航班号、目的地和登机口。

boarding是什么意思：
n. 木板；寄膳宿；上船，登机
adj. 供膳的

a plotting board
测绘板

They piped the captain on board.
他们以笛声欢迎船长登船。

the board on which backgammon is played.
用来玩西洋双陆棋的板子。

integrated circuit chip board
集成电路片试验板

Square the corners of a board.
使一块板的几个角成直角。

gate是什么意思：
n. 大门；出入口；闸门；登机门

Close the lock gate please.
请关上闸门。

Please keep clear of the gates.
请勿靠近门。

main gate lodge
大闸区；大闸门房；大闸传达室

He is a gate-crasher.
他是个不速之客

josephson junction logic gate
约瑟夫逊结逻辑门电路