logical       
adjective uk/ˈlɒdʒ.ɪ.kəl/ us/ˈlɑː.dʒɪ-/
B2 合乎逻辑的,合理的
using reason
  a logical choice/conclusion 合乎逻辑的选择/结论 
 Students need the ability to construct a logical argument. 学生要具备逻辑论证的能力。 
 It was the logical thing to do (= the decision was a reasonable one when all the facts were considered). 这样做才合乎逻辑。 
 Opposite: illogical