touchdownn.
英 'tʌtʃdaʊn | 美 'tʌtʃdaʊn
中文n. 着陆，降落；触地；触地得分
词根词源
touchdown (n.)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.
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