unnoticeable
01
不显眼的, 难以察觉的
not easily seen, observed, or perceived due to a lack of prominence
例子
The changes to the website were so unnoticeable that users did n’t realize it had been updated.
网站的变化如此不明显，以至于用户没有意识到它已经更新了。
The small crack in the wall was unnoticeable unless you were looking closely.
墙上的小裂缝不易察觉，除非你仔细看。
词汇树
unnoticeable
noticeable
notice
