Grant说，对机器人而言，角度、光照或者大小的变化意味着它必须从头学起。

For a robot, a change in the Angle, lighting or size means they have to learn to read all over again, said Grant.

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这幅照片中的浮油有些难以辨认，这是因为拍摄的角度和光照条件不理想，而不是因为浮油开始消散了。

The slick is somewhat harder to make out in this shot, but this is because of the viewing angle and light conditions, not because the oil slick is dispersing.

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由于太阳光照射角度太小，“勇气号”只好休眠，用它能接收到的微弱太阳能来充电，将自身温度维持在华氏40度。

With sunlight reaching Spirit at a weak Angle, the rover hibernates and USES the scant solar power to recharge batteries and heat itself to -40 degrees [Fahrenheit].

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