大部分摄像机的上面都有一个小的螺丝孔用来把相机固定到一个三角架或者其他稳定的拍摄支架或结构上。

Most cameras have a small screw-hole somewhere on them that allows the camera to be mounted to a tripod or other steady filming stand or structure.

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数十年来，驾驶一架飞行机、稳定航线并处理紧急问题的最好方式就是一位人类飞行员的眼睛、平衡感以及熟练地用手操作。

For decades a human pilot's eyes, sense of balance and hands were simply the best way to guide a flying machine, stay on course and cope with problems.

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而卫星数据表明南极冰架正在融化，从历史记录中，我们得知几度的温度上升就会让部分冰架变得不稳定。

But satellite data shows that Antarctica is losing ice, and from the geological record we know that just a few degrees of warming makes parts of the ice sheets unstable.

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