West Africa was the pivot of the cocoa trade.西非是可可豆贸易的中心。The pedal had sheared off at the pivot.踏板在枢轴处断裂了。Forming the pivot of the exhibition is a large group of watercolours.整个展览的重点是一大组水彩画。...
turning on a pivot在枢轴上转动The pedal had sheared off at the pivot.踏板在枢轴处断裂了。Forming the pivot of the exhibition is a large group of watercolours.整个展览的重点是一大组水彩画。Torsional microslip at the clamps results in spurious torques w...