1. Over ninety percent of the islanders here are illiterate.
    这儿的岛民百分之九十以上都是文盲。

2. Over ninety percent of the islanders here are illiterate.
    这儿的岛民百分之九十以上都是文盲。

3. It suddenly dawned on me that this express was not roaring down the line at ninety miles an hour, but barely chugging along at thirty.
    我突然感到这趟快车并没以时速90英里的速度呼啸前进，而是卟哧卟哧地向前爬行，时速仅30英里。