英语语法分析

Studies have shown, for example, that two drugs are about equally effective in treating macular degeneration, an eye disease.

例如，有一些研究表明，两种药物治疗黄斑变性这种眼病的效果差不多。

Macular degeneration is becoming a widespread problem.

黄斑恶化正在成为一个普遍的问题。

Age related macular degeneration is the leading cause of visual loss in older people.

老年黄斑变性是导致老年人视力衰退的主要原因。