Untreated, we know poor vision keeps people from reaching their full potential.

如果不进行治疗的话，我们都知道视力不好会影响人，让人无法充分发挥自己的潜能。

This lecture is about how fish with poor vision navigate their environment.

这个演讲讲的是视力不好的鱼如何在环境中航行。

Now the question is how do fish that have poor vision navigate their environment.

现在的问题是视力不好的鱼如何辨明方向。

You're asked to describe the two ways that fish with poor vision navigate their environment.

题目要求你描述视力不佳的鱼类在环境中的两种导航方式。

Ultimately, these are the two ways that fish with poor vision navigate their environment.

最后，这就是视力不佳的鱼的两种在环境中导航的方式。

And then I was taken for an eye test, where they found that I had really poor vision.

然后我去做了验光才发现自己视力很差。

The advantage of sonar is it allows you to make up for conditions of poor vision at night, in murky water.

声纳的优势是它能弥补在晚上或是浑浊的水中视野不好的情况。

When she was alive, she always wore a visor for her poor vision.

当她活着的时候，她因为她的差视力而总戴着护目镜。

If that were the case, we’d all be doing eye exercises to cure our poor vision.

如果是这样的话， 我们都会做眼保健操来治愈我们的视力不佳。

I started out by saying " this lectures about" and then I filled in the main topic—how fish with poor vision navigate their environment.

我先说了“这个演讲是关于......的”，然后我加入了主要话题——视力不佳的鱼如何在环境中导航。

Nevertheless, for those who can afford them, soft contact lenses are a safe, simple and attractive solution to the problem of poor vision.

尽管如此，对于那些负担得起的人来说，软性隐形眼镜是解决视力不佳问题的一种安全、简单且有吸引力的解决方案。

Third, the reading suggests that the reason there were so many red, winged black birds among the dead birds is that red, winged black birds have poor night vision.

第三，阅读表明死鸟中之所以有这么多红翅黑鸟，是因为红翅黑鸟的夜视能力很差。