这是冰心的一句名言，也是她一生坚持的信念。“永远的爱心”融入她近八十年的文学创作，洋溢在她七百万字的作品的字里行间。

世界上充满了显而易见的事情，却没有人去观察。

数学是一门活生生的学科，随着新的思想和发现不断演变。

The food issue is not only an economic issue, but also a political one, related to the long-term stability of the country.

If ease of use was the only requirement, everyone would still be riding tricycles.