起飞：take off
The plane took off at three o'clock.飞机三点钟起飞了.
降落：
1.landing
The planemade a safe landing.飞机安全着陆.
The plane's landing was delayed because of heavy fog.飞机因大雾推迟降落.
2.touch down
The spacecraft touched down on schedule.
太空飞船按计划着陆了