perfectly
/ˈpɜːfɪktlɪ/adverb
1- in a manner or way that could not be better完美地, 完善地, 极好地：
the ring fitted perfectly
那戒指非常合适
as submodifier perfectly clean glass bottles.非常干净的玻璃瓶。
1.1
- as submodifier used for emphasis, especially in order to assert something that has been challenged or doubted完全地; 十分, 非常（用于强调, 尤指为了声明已受到质疑或怀疑的事）：
you know perfectly well I can't stay.
你非常清楚我不能留下来。