凝思: be buried in thought; be deep in contemplation 短语和例子对窗凝思 stand by the window meditating
根本: 1.(基本的; 主要的) root; radical; basic; fundamental; essential; cardinal; foundation; origin 短语和例子根本利益 fundamental interests; 根本原因 basic reason; root cause; 实现根本好转 bring about a fundamental tur