来自 reason,理由，-able,形容词后缀。

1. They will need a reasonable amount of desk area and good light.

他们将需要一个面积较大的摆放办公桌的地方和充足的照明。

2. It seems clear that he has no reasonable alternative.

他没有其他合适的选择，这一点似乎很清楚。

3. You get an interesting meal for a reasonable price.

你花不多的钱就可以吃一顿很特别的饭。

4. Only a third of these households thought it reasonable to meter water.

这些家庭当中只有三分之一认为用水表计量是合理的。

5. Teachers can only be expected to do what is reasonable and practicable.

教师只应该做合情合理而且切实可行的事。