"基本工作方式" can be translated into English as "basic working mode" or "fundamental mode of operation".
"Basic working mode" is a straightforward and commonly used expression, directly conveying the idea of the fundamental or primary way of working.
"Fundamental mode of operation" is slightly more formal and emphasizes the foundational or essential nature of the working method.
Both expressions are appropriate, and the choice between them may depend on the specific context and the desired level of formality.