unimpeached
不容怀疑的
无可指摘的
例句
Both the reports conclude that the science of climate is sound and that the professional characters of the scientists involved are unimpeached.
来自双方的报告都得出结论说气候学界的学术气氛是科学健全的,被牵连的科学家的职业操守也是无可厚非的。