rational real number

例句：

1. 1. The decision was based on rational considerations.
   这个决定是基于合理考虑做出的。
2. 2.He made a rational decision to move abroad.
   他做出了一个理智的决定搬到国外去。
3. 3.She believed in the rationality of science.
   她相信科学是合乎逻辑的。