人工生物角膜在中国研发成功

人工生物角膜在中国研发成功 　　

According to statistics, visual impairment for one forth¹ of China's blind population was caused by problems with the cornea. For these people, a cornea transplant is the only hope they have of seeing again.

　　In the past, cornea transplants relied solely² on donation, making corneas is a scare resource. Scientists around the world have been looking for proper material to create a substitute for the human cornea. However, making an artificial cornea that has the identical intricate structure to a human cornea is very difficult.

　　After more than 10 years of effort, researchers in The Fourth Military Medical University have successfully made a biological cornea from that of a pig, which function's like the human cornea. Professor Jin Yan is the director of the school of organ engineering.

　　"A pig's organ structure is very close to that of a human's. But to use it, we must remove the pig's antigenicity and cells, while maintaining the useful collagenous fibers³. This is the key to making a perfect cornea. It's also one of the most challenging technical difficulties."

　　Jin Yan says a few high-tech⁴ reagents are the final solution to this problem.

　　China's artificial biological cornea was put into clinical trials in 2010. One-hundred and fifteen patients from different hospitals in the country participated in the trial.

　　Zou Liuhe, a doctor at Beijing Tongren Hospital, says the trials proved successful.

　　"We see from observation that such cornea can help the recovery of ulcers⁵. No rejection⁶ reaction was found between the two organs. Seventy percent of the replaced corneas are clear and safe to use in humans."

　　Zhang Mingchang, director of the ophthalmology department at Wuhan Union Hospital, says the clinical trial success of China's artificial biological cornea may bring big hopes for the visually impaired⁷ nation-wide.

　　"These artificial corneas solve the problem of material scarcity⁸. We can use such products to perform operations in a timely manner. It especially benefits patients who are in the early stages of visual impairment--it gives us more options."

　　Figures show that more than five million people in China need cornea transplant operations. The number is growing by about 100,000 each year, but only 3,000 corneas were donated annually⁹.

1 forth   

adv.向前；向外，往外

参考例句：

• The wind moved the trees gently back and forth.风吹得树轻轻地来回摇晃。
• He gave forth a series of works in rapid succession.他很快连续发表了一系列的作品。

2 solely   

adv.仅仅，唯一地

参考例句：

• Success should not be measured solely by educational achievement.成功与否不应只用学业成绩来衡量。
• The town depends almost solely on the tourist trade.这座城市几乎完全靠旅游业维持。

3 fibers   

光纤( fiber的名词复数 )； （织物的）质地； 纤维，纤维物质

参考例句：

• Thesolution of collagen-PVA was wet spined with the sodium sulfate as coagulant and collagen-PVA composite fibers were prepared. 在此基础上，以硫酸钠为凝固剂，对胶原-PVA共混溶液进行湿法纺丝，制备了胶原-PVA复合纤维。
• Sympathetic fibers are distributed to all regions of the heart. 交感神经纤维分布于心脏的所有部分。

4 high-tech   

adj.高科技的

参考例句：

• The economy is in the upswing which makes high-tech services in more demand too.经济在蓬勃发展，这就使对高科技服务的需求量也在加大。
• The quest of a cure for disease with high-tech has never ceased. 人们希望运用高科技治疗疾病的追求从未停止过。

5 ulcers   

n.溃疡( ulcer的名词复数 )；腐烂物；道德败坏；腐败

参考例句：

• Detachment of the dead cells produces erosions and ulcers. 死亡细胞的脱落，产生糜烂和溃疡。 来自辞典例句
• 75% of postbulbar ulcers occur proximal to the duodenal papilla. 75％的球后溃疡发生在十二指肠乳头近侧。 来自辞典例句

6 rejection   

n.拒绝，被拒，抛弃，被弃

参考例句：

• He decided not to approach her for fear of rejection.他因怕遭拒绝决定不再去找她。
• The rejection plunged her into the dark depths of despair.遭到拒绝使她陷入了绝望的深渊。

7 impaired   

adj.受损的；出毛病的；有（身体或智力）缺陷的v.损害，削弱( impair的过去式和过去分词 )

参考例句：

• Much reading has impaired his vision. 大量读书损害了他的视力。 来自《现代汉英综合大词典》
• His hearing is somewhat impaired. 他的听觉已受到一定程度的损害。 来自《现代汉英综合大词典》

8 scarcity   

n.缺乏，不足，萧条

参考例句：

• The scarcity of skilled workers is worrying the government.熟练工人的缺乏困扰着政府。
• The scarcity of fruit was caused by the drought.水果供不应求是由于干旱造成的。

9 annually   

adv.一年一次，每年

参考例句：

• Many migratory birds visit this lake annually.许多候鸟每年到这个湖上作短期逗留。
• They celebrate their wedding anniversary annually.他们每年庆祝一番结婚纪念日。