Dolphins have great eyesight, but the ocean can be very dark. It's hard for dolphins to see the little fish they like to eat on the ocean floor.

海豚视很好，但海洋里可能非常黑暗。海豚很难看到它们喜欢吃的、在海底的小鱼。

Harry, your eyesight really is awful!

哈利，你的视可真糟糕！

Has the MacBook improved my vision? Absolutely.

MacBook 有没有提升我的视？置疑。

She has very poor eyesight, she can read nothing without her specs.

她的视很差，没有眼镜她就什么也读不了。

The fever cut her off from the outside world, depriving her of sight and sound.

高烧将她外界隔离，使她失去了视和声音。

Does the headache ever upset your eyes, for example, does your vision get blurred?

头痛影响到你的视了吗，比如，你的视模糊吗？

“Harry, your eyesight really is awful, ” said Hermione, as she put on glasses.

“哈利，你的视真是糟透了。”赫敏边戴眼镜边说。

The truth is that all 1100 bat species can see and often their vision is pretty good, although not as excellent as other night-hunting animals.

事实上，所有 1100 种蝙蝠都能看见，而且它们的视往往相当好，尽管不像其他夜间狩猎动物那样出色。

In fact, we need blue light during the day to be healthy, but too much blue light, especially from electronic devices, can harm our health by weakening our vision and making it harder for us to fall asleep.

事实上，我们要蓝光来保持健康，但过多的蓝光，尤其是来自电子设备的蓝光，会削弱我们的视，使我们入睡变得困难，从而损害我们的健康。

The Half Helen Foundation is the work of a CNN Hero to give free hearing and vision screenings to kids at school.

Half Helen基金会成为了我们的“CNN英雄”，它为学校里的孩子们提供免费的听和视检查。

Large eye sockets, indicating fine vision, and small, pointy teeth both suggest that it hunted insects.

大眼眶表明它的视好，尖尖的牙齿会使人想到它捕食昆虫。

After two years his sight began to return in one eye.

两年后，他的一只眼睛开始恢复视。

Wewalk is a smart cane developed for visually impaired people you can easily connect Wewalk to your smartphone via Wewalk's application and it's so joyful - - you know you can talk with your cane and your cane is answering you.

Wewalk是专为视损伤人群制定的盲杖，你可以通过软件轻松地把它手机连接，使用过程很享受——你可以和它讲话，它会回应你。

At the age of 34, he'd been legally blind.

在他34岁的时候，他失去了视。

But modern science shows that video games may actually help improve your vision.

可是现代科学发现电子游戏可以提高视。

Every athlete had the chance to have a hearing check a vision check dental check, receive a new pair of shoes, learn mindfulness and so much more.

每一个运动员都有机会体验听检查、声带检查、视检查、口腔检查，获得一双新鞋，学习正念减压法等等。

KURSAT CEYLAN, CO-FOUNDER, WEWALK: There are 253 million visually impaired people in the world, and these people have been still using just a plain stick.

世界上有2.53亿视受损的人，而这些人仍然只使用一根普通的棍子。

With only one shoe, blurry vision and one eye to see out of, I used my remaining shoe as a guide to test the ground in front of me for any objects or snakes.

我只有一只鞋，视很模糊，而且只有一只眼睛可以看到外面，我用剩下的那只鞋作为探测物，测试我前面的地面上有没有什么障碍物或蛇。

Sixty million years ago, they lost the ability to see.

树懒六千万年前就丧失了视。

The program got its start really as an experiment to say, we can train a dog to help somebody who has visual impairment, perhaps we can train a primate to be the hands for somebody who has had a spinal cord injury.

这个项目真正开始是作为一个实验来说明的，我们可以训练狗去帮助视受损的人，也许我们可以训练灵长类动物来帮助那些有脊髓损伤的人。