See sb off: to go to a station, an airport, etc. to say goodbye to sb who is starting a journey 为…送别,送行
He saw his friend off at the bus station.
他在车站给朋友送行.

Touch down: (飞机等)着陆,降落
The plane touched down at 17:45 at Heathrow Airport.
飞机于17点45分在希斯罗机场降落.