logical 
英 [ˈlɒdʒɪkəl]  美 [ˈlɑdʒɪkəl] 
adj. 逻辑的；逻辑学的；合乎逻辑的；合理的

例句：
If the climate gets drier, then the logical conclusion is that even more drought will occur. 

如果气候变得更干燥，必然会有更多地方出现旱情。

My professional training has taught me to have a strong ability to logical thinking. 

我的专业训练教会了我很强的逻辑思维能力。

Each logical step has been checked by other mathematicians. 

每一逻辑步骤都被其他数学家验证过了。

This is the only logical thing to do. 

这是要做的唯一合理的事情。

It is logical to take precautions. 

采取预防措施是理所应当的。