unobvious

The difference between the two colors is unobvious at first glance.

用法提示：unobvious 作表语，表示“不明显的”，说明颜色区别不易察觉。

Her reason for leaving was unobvious, so we asked her directly.

用法提示：unobvious 作表语，表明原因并非显而易见。

The connection between the clues was unobvious until the detective explained it.

用法提示：unobvious 作表语，强调线索联系难以看出。