不变的真理、事实

The sun rises in the east. 太阳从东方升起。

The earth is round. 地球是圆的。

The earth moves around the sun. 地球绕太阳而行。

There are twelve months in a year. 一年有12个月。

Oil and water do not mix. 油和水不会混合。

Snow is white. 雪是白色的。

Dogs and cats are animals. 狗和猫都是动物。