完美地;毋庸置疑地;无瑕疵地;
例句:
She was impeccably dressed in the latest fashion.
她穿着最新流行的衣服显得完美无瑕.
This is an impeccably researched and very readable book.
这本书中的研究缜密透彻,可读性很强。
The inside is impeccably clean, and even the outside looks new.
里面是干净的无懈可击, 甚至外面看起来新的.