如果不考虑它们究竟是作为物理系统还是作为某一个组成部分的话，它们共有着一些通用的物理属性，比如重量、长度、宽度、高度等等。

Regardless of whether we consider the physical systems themselves or their individual constituent parts, they share some common physical properties, such as weight, length, width, height, etc.

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相反，联邦航空局建议——强调“建议”——这种无人机要在一定的高度之下，远离居民区，远离机场飞行，等等。

Instead the FAA recommends - emphasis on 'recommends' - such drones be flown away from populated areas, from aeroplanes, below a certain altitude and so on.

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在这个快节奏的忍者攀爬游戏中，你的目标是上升到你能上升的最高高度，同时要避免杀手松鼠，愤怒的小鸟，敌人忍者，投掷的星星和爆炸的炸弹等等的攻击。

In this fast paced ninja climbing game, your goal is to rise as high as you can while avoiding killer squirrels, angry birds, enemy ninjas, throwing stars and exploding bombs.

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