1864, originally in rugby, where the ball is literally touched down on the other side of the goal, from verbal phrase (by 1859 in sports), from touch (v.) + down (adv.). As "landing of an aircraft" from 1935.
双语例句
1. The crowd yelled when the hometown team scored a touchdown.
当他们自己的队得了底线分时,人群高声呼喊起来.
来自《简明英汉词典》
2. The Tigers broke the ice with a touchdown.
虎队首先底线得分,打破僵局.
来自《现代汉英综合大词典》
3. He caught a punt and scored the winning touchdown, with a minute left to play.
他接住对方的弃踢球，成功达阵，取得了制胜得分，此时比赛只剩最后一分钟。
来自柯林斯例句
4. Controlled land landing also demanded some way to cushion touchdown impact.
定点控制着陆还要求解决着陆时所产生的强大冲力问题.
来自英汉非文学 - 科学史
5. The touchdown happened a little late because of cloudy and windy weather.
