不明显的

The change was so unnoticeable that nobody realized the difference.
这个变化如此细微，没有人意识到有什么不同。
She tried to make her entrance unnoticeable, slipping into the room without making a sound.
她试图不引人注意地进入，悄无声息地溜进房间。
His mistake was unnoticeable to everyone except the teacher.
他的错误除了老师之外没人注意到。
The subtle difference in color was unnoticeable under normal lighting conditions.
在正常照明条件下，颜色的细微差异是不明显的。
The small scratch on the car was unnoticeable unless you looked closely.
车上的小划痕如果不仔细看是看不出来的。
Her new hairstyle was so unnoticeable that even her closest friends didn't realize it at first.
她的新发型非常不显眼，就连她最亲密的朋友起初都没有察觉。
The improvement in his skills was unnoticeable until he won the competition.
他技能的提高直到他在比赛中获胜才变得明显。
The unnoticeable error in the report went unnoticed by the supervisor.
报告中的微小错误被主管忽略了。
The unnoticeable shift in his attitude towards her went unnoticed by him.
对她的态度的微妙转变他自己都没注意到。
The faint aroma of the perfume was unnoticeable in the crowded room.
香水的淡淡香味在拥挤的房间里并不显眼。