Medical researchers have made a significant advance in understanding multiple sclerosis, a neurological disease that causes symptoms ranging from muscle weakness to paralysis.

医学研究已取得重大进展，在了解多发性硬化症一种神经性疾病的成因，症状从肌肉。

The most significant advance, though, came from outside the park.

虽然如此，最重大的进展却是来自于国家公园之外。

This is a significant advance compared to experiments that have been performed over the past 20 years.

比起过去二十年做过的实验来说，这是个重大的进展。

To have one drug that postponed many degenerative diseases in people would be a significant advance, he said, even without any increase in longevity.

有一个药物推迟许多退化性疾病的人将是一个重大的进步，他说，即使没有任何增加长寿。