是女儿西门子科学竞赛的奖品之一。新鲜了两天半,就束之高阁了,现在已经落满了灰尘。
还是传统的木框来的耐看耐用,咱是老古董,呵呵。
是女儿西门子科学竞赛的奖品之一。新鲜了两天半,就束之高阁了,现在已经落满了灰尘。
还是传统的木框来的耐看耐用,咱是老古董,呵呵。
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