subtle facial expressions or reactions that reveal one's mood or attitude; by extension, referring to the nuances in how one behaves or interacts with others, often implying a need for discernment or tact.
在职场中，学会察言观色，懂得眉眼高低，对人际交往很有帮助。
In the workplace, learning to observe subtle expressions and understanding the nuances of social interaction is very helpful for interpersonal communication.
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