To increase one's knowledge in English is to "expand one's horizons," "broaden one's mind," or "enrich one's understanding." This phrase comes from the idea that gaining new knowledge can help a person see beyond their current way of thinking and open them up to new ideas and perspectives.

Here are some examples of how to use this phrase in a sentence:

"Reading books from different genres can help expand your horizons and give you a new perspective on life."

"Traveling to different countries can broaden your mind and enrich your understanding of different cultures."

"Taking classes or workshops in a subject you're not familiar with can help increase your knowledge and improve your skills."

In Chinese, this phrase could be translated as "扩大视野," "开阔思维," or "丰富理解."