It doesn't matter. I have a good eyesight.
没关系，我视力好着呢。
Contact lenses have been developed to help people who are not comfortable wearing glasses to loose them but still keep a good eyesight.
发明隐形眼镜就是让那些戴眼镜不方面的人可以完全不用戴眼镜，而视力也能非常好。
Their eyesight is very good. They have a constant body temperature.
它们的视力非常好。它们有恒定的体温。
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