VOA慢速英语:Scientists Seeking Better Treatments for Multiple Sclerosis

more and more越来越

例句：He speaks more and more openly about his problem.
      他越来越公开地谈他的问题。

2.Recently, an American study showed that women who get plenty of vitamin D during pregnancy may be protecting their babies from developing MS later in life.

plenty of很多, 大量的

例句：There is plenty of coal in this area.
      这个地区有丰富的煤。

      She had plenty of imagination.
      她有丰富的想象力。

3.MS symptoms can depend on where the nerve scars are in the central nervous system.
 
depend on依赖,依靠;取决于,随…而定

例句：His decision will depend on how much money we can raise.
      他将根据我们能筹集到的款项的多少作出决定。