留美老师带你每日说英文 第748期:引起近视的原因

 　　台湾籍旅美老师今天交给我们的句子是：

　　A condition called Myopia where the eyes cannot focus properly is seen much more frequently in children who spend more time inside. Not only are you constantly forced to focus on nearby objects as opposed to far off landscapes and distances, but scientists believe that the sun itself, may actually play a role in healthy eye regulation.

　　近视是指一种眼睛无法准确聚焦的状况，时常待在室内的儿童更常会出现这种状况。不仅是因为你必须一直聚焦看着身边的近物（而不是看着远方的景色或远处），而且科学家也相信，太阳本身实际上是可以帮助眼睛保持健康的。

　　引起近视的原因

　　学习重点：

　　1.condition 情况

　　condition (n.) 情况

　　conditional¹ (adj.) 有条件的

　　conditioner (n.) 调节器、润发乳

　　2.Myopia 近视

　　Myopia (n.) 近视

　　3.frequently 频繁地

　　frequently (adv.) 频繁地

　　frequent (adj.) 频繁的

　　frequency² (n.) 频繁

　　4.distance 距离

　　distance (n.) 距离

　　distant (adj.) 远的

1 conditional   

adj.条件的，带有条件的

参考例句：

• My agreement is conditional on your help.你肯帮助我才同意。
• There are two forms of most-favored-nation treatment:conditional and unconditional.最惠国待遇有两种形式:有条件的和无条件的。

2 frequency   

n.次数，频率；经常发生，频繁

参考例句：

• If we can know their frequency we will monitor their talking.如果我们知道他们的频率,我们就能监听他们的谈话。
• The tanks broke down with increasing frequency.坦克越来越频繁地熄火。