英语沙龙：如何保持敏锐的视力

How to keep your eyesight sharp

１. Boost your beta carotene intake¹. Eat lots of oranges and yellow fruits and vegetables such as spinach². 

２. Eat other carotenoids too. Beta carotene is only one of more than ５００members of the carotenoid family. A study also suggests that carotenoids found in green leafy vegetables（such as broccoli³ and kale）may help prevent vision loss. 

３. Stay active. A study found that people who bicycled four times a week for ４０minutes had a ２０percent drop in eye pressure. 

４. Block the sun. Some studies link long-term exposure to ultraviolet rays（UV）to cataract⁴ formation. To protect your eyes, wear sunglasses with a special coating that locks UV light. 

５. Stop smoking. According to a study, people who smoke 35 or more cigarettes a day have a 63 percent greater risk of developing cataracts⁵.

如何保持敏锐的视力

１. 增加β-胡萝卜素的摄入量。 食用大量的柑橘、黄色水果和蔬菜, 如菠菜。

２. 同时摄入其他类胡萝卜素。 β-胡萝卜素在５００多个成员的类胡萝卜素属中, 只是其中一员。一项研究报告指出, 在绿叶蔬菜（如花椰菜和甘蓝菜）中发现的类胡萝卜素, 可能有助于防止视力下降。

３. 经常活动。 一项研究发现, 一星期骑自行车４次共４０分钟的人, 眼压降低２％。

４. 遮挡阳光。有些研究认为白内障的形成与眼睛长期暴露在紫外线下有关。可戴镀有防紫外线膜的太阳镜来保护眼睛。

５. 戒烟。 研究表明, 与不吸烟的人相比, 一天抽３５支烟或更多的人, 得白内障的危险高６３％。

1 intake   

n.吸入，纳入；进气口，入口

参考例句：

• Reduce your salt intake.减少盐的摄入量。
• There was a horrified intake of breath from every child.所有的孩子都害怕地倒抽了一口凉气。

2 spinach   

n.菠菜

参考例句：

• Eating spinach is supposed to make you strong.据说吃菠菜能使人强壮。
• You should eat such vegetables as carrot,celery and spinach.你应该吃胡萝卜、芹菜和菠菜这类的蔬菜。

3 broccoli   

n.绿菜花，花椰菜

参考例句：

• She grew all the broccoli plants from seed.这些花椰菜都是她用种子培育出来的。
• They think broccoli is only green and cauliflower is only white.他们认为西兰花只有绿色的，而菜花都是白色的。

4 cataract   

n.大瀑布，奔流，洪水，白内障

参考例句：

• He is an elderly gentleman who had had a cataract operation.他是一位曾经动过白内障手术的老人。
• The way is blocked by the tall cataract.高悬的大瀑布挡住了去路。

5 cataracts   

n.大瀑布( cataract的名词复数 )；白内障

参考例句：

• The rotor cataracts water over the top of the machines. 回转轮将水从机器顶上注入。 来自《现代英汉综合大词典》
• Cataracts of rain flooded the streets. 倾盆大雨弄得街道淹水。 来自辞典例句