要成为一名驾驶员，视觉上分辨红色与绿色的能力是必不可少的。
The ability to visually distinguish between red and green is essential to becoming a driver.
某些盲人可以分辨出黑暗中的光亮，另外一部分盲人可以有少部分视觉。
Some blind people can tell light from dark; others also have a small amount of vision.
男性和女性鳄鱼可能很难分辨视觉。
Male and female crocodilians can be hard to tell apart visually.
男性和女性鳄鱼可能很难分辨视觉。
Male and female crocodilians can be hard to tell apart visually.
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