"To express (something) through action" is a way to describe the act of demonstrating or showing something through physical actions rather than words. This phrase can be translated into Chinese as "用行动表示" or "通过行动来表达".

This phrase is commonly used in Engpsh to describe situations where a person is trying to communicate or convey a message or emotion through their actions rather than through verbal communication. For example:

"She expressed her frustration through her body language, crossing her arms and frowning." (她通过身体语言表达了她的沮丧，双臂交叉，皱着眉头。)
"He expressed his love for his wife through small gestures, pke bringing her flowers and making her breakfast in bed." (他通过一些小动作表达了对妻子的爱，比如给她送花，在床上给她做早餐。)

In these examples, the person is using their actions to communicate something, rather than using words. This phrase is often used in the context of nonverbal communication, where people rely on their body language and other forms of nonverbal expression to convey meaning and emotions.