1.This disease of doubtfulness and discouragement is an epidemic which soon spreads amongst the Lord's flock.
怀疑和恐惧是一种瘟疫，会迅速在主的羊群中传染开来。
2.The findings indicate that the good features of high group-caring and low doubtfulness are helpful for implementing mental health education;
结果显示：体育教师人格中的高乐群性、低怀疑性等优良特质有利于实施学生心理健康教育；
3.ambiguity: Doubtfulness or uncertainty as regards interpretation:
含糊不清；不明确解释有疑问或不确定
4.Doubtfulness or uncertainty as regards interpretation
含糊，不明确