subtle

delicate, fine, subtle

这3个形容词均含“微妙的，细微的”之意。
delicate: 侧重指需要谨慎处理和对待。
fine: 隐含“不易察觉的”意味。
subtle: 侧重有洞察、领悟事物细微差别以及微妙关系的能力。

形容词 subtle:

1. be difficult to detect or grasp by the mind
   同义词：elusive
2. faint and difficult to analyze
3. able to make fine distinctions
4. working or spreading in a hidden and usually injurious way
   同义词：insidious, pernicious

1. Note the subtle gradation of/in colour in this painting.
   注意这幅画中色彩的细微变化。
2. Subtle lighting helps people relax.
   光线暗淡有助於人们松弛精神。
3. I have noticed the subtle gradation in colour in this painting.
   我已经注意到这幅画中色彩的层次。
4. There were subtle hints in his letter.
   他的信中有些微妙的暗示。
5. He is a man of subtle and refined sensibility.
   他是个感情细腻的男子。
6. She has a very subtle mind.
   她头脑敏锐。
7. She has a subtle charm.
   她有难以形容的魅力。