touch·down /ˈtʌʧˌdaʊn/
觸地,觸地得分,著地,降落
Touch·down n. Football The act of touching the football down behind the opponents' goal; also the score (6 points) resulting from such a play.
Safety touchdown. See under Safety.
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touchdown
n 1: a score in American football; being in possession of the
ball across the opponents' goal line
2: a landing (as the wheels touch the landing field);
especially of airplanes