Some of the great hopes for cloning include the ability to perform transplants, whenever they are needed, using cloned organs. For example, people with lung cancer may simply have their lungs replaced with healthy ones. Scientists also look forward to the day when people in wheelchairs can walk again, and illnesses such as Alzheimer's and Parkinson's Disease can be prevented.

人們對克隆的一些偉大希望包括在需要進(jìn)行移植手術(shù)時(shí)人們能使用克隆器官。例如：肺癌患者可能僅需換個(gè)健康的肺。科學(xué)家也期待著有一天長期坐輪椅的人能再站起來，老年癡呆癥及帕金森氏癥等疾病也都能事先預(yù)防。

重點(diǎn)解析：

clone vt. 克隆，復(fù)制
You wonder why they can clone sheep but you can't dupe the cows.
你不明白為什么他們能克隆羊而你不能復(fù)制牛。
transplant vt. 移植
It is now possible to transplant organs from animals into people.
現(xiàn)在將動(dòng)物身上的器官移植入人體內(nèi)已經(jīng)成為了可能。
The doctors will transplant a human heart into the patient.
醫(yī)生們將把一顆人的心臟移植到這個(gè)病人身上。
organ n. 器官
Alzheimer's n. 阿爾茨海默病（老年癡呆癥）
Parkinson's n. 帕金森氏綜合癥
prevent vt. 預(yù)防，防止
Scientists are trying to find ways to prevent disease.
科學(xué)家們正試圖找到預(yù)防疾病的方法。