hub
noun [ C ] uk/hʌb/ us/hʌb/
(CENTRAL PART)
中心；枢纽
the central or main part of something where there is most activity
The City of London is the hub of the UK's financial world. 伦敦城是英国金融业的中心。
The computer department is at the hub of the company's operations. 计算机部是这家公司运转的枢纽。
(WHEEL)
轮毂
the central part of a wheel into which the spokes (= bars connecting the central part to the outer edge of the wheel) are fixed