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| 11. | the storm left the driveway littered with sticks and debris; his library was a cluttered room with piles |
| 暴风雨使车道上乱摆着棍棒和碎片；他的藏书室很乱，椅子上放着一堆堆的书。 |
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| 12. | Getting a robot to navigate across a cluttered room is difficult enough without having to take into account |
| 单单让一个机器人在杂乱的房间中自由识别方向前进已令科学家们挠头不止，而且并没有考虑到它各种各样的机械手臂和附件将会在沿途撞上什么东西的复杂状况。 |
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