17 年前
视频简介
Massive machines require engineering extremes. The massive man-made satellite, commonly known as the International Space Station, hurtling around the Earth at 27,600 km an hour, has been a temporary home for humans for the last 20 years. The biggest land vehicle on earth, a bucket excavator titled Bagger 293, that can move 240,000 cubic meters of dirt each day. Innovation has a...。为了让混乱的成语世界重回正轨，小羊和灰太狼进入成语世界展开大冒险。虽然小羊们和灰太狼总会碰到棘手的成语问题，但每一个困难，却都是激活他们智慧的推动器。修复成语的过程充满奇趣，而修复的成语越多，小羊们与灰太狼就越喜欢成语，心中的“知识宝库”也越来越丰厚了。。
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