我们只是说明，眼睛虽然有非常广阔的活动范围，可是它是有缺点的。
All I want to show is that although the eye has an extremely wide scope of activities, it is, nevertheless, far from being faultless.
我们只是说明，眼睛虽然有非常广阔的活动范围，可是它是有缺点的。
All I want to show is that although the eye has an extremely wide scope of activities, it is, nevertheless, far from being faultless.
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