He balances the two ton machine on one foot while sweeping the arms in strong, graceful arcs.
他用一只脚平衡着两吨重的机器，手臂用力而又优雅地挥舞着。
Why It's Unique: Employees clocking in at the complextake a daily commute down a roughly 2000-foot tunnel, traveling througha few 25-ton blast doors along the way.
独特之处： 员工每天上下班要通过大约2000英尺的隧道向下，经过数道25吨的防爆门。
If scientists were to detect a 600-foot-wide asteroid ten years in advance, Yeomans says, it could be deflected with a two-ton projectile traveling six miles per second.
约曼斯说，如果科学家能提前10年探测到一颗600英尺直径的小行星，就可以使用一颗两吨重，每秒速度6英里的弹道飞行器使其偏离轨道。
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