1. 头脑冷静的,稳健的：lasting 持久的,永久的 | levelheaded 头脑冷静的,稳健的 | limpid 清澈的;透明的

2. 正确 冷静的：least 正确 最少,最小 | levelheaded 正确 冷静的 | mainly 正确 主要地

3. 头脑冷静的：leisured:从容不迫的 | levelheaded:头脑冷静的 | level pegging:势均力敌

4. 稳健的：bullheaded 顽固的 | levelheaded 稳健的 | pigheaded 顽固的

adj

1. exercising or showing good judgment

e.g. healthy scepticism
a healthy fear of rattlesnakes
the healthy attitude of French laws
healthy relations between labor and management
an intelligent solution
a sound approach to the problem
sound advice
no sound explanation for his decision

Synonym: healthyintelligentlevel-headedsound