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。
词汇树
unnoticeable
noticeable
notice
