first time 首次，第一次。 例句 It was the first time I had set foot on American soil. 那是我第一次踏足美洲大地。 It was the first time I had set ...
seenv.看见；见到；看出；看得见；看； seen是see的过去分词； 例如I havent seen him since the summer before last. That\'s the best movie I\'ve seen i...
foot是单数，foot的复数形式是feet； foot n. (人或动物的)脚，足;有…脚(或足的);有…只脚(的);用…脚(或足的);(袜子的)足部; v. 走，踏;合计，结算（up），加...
