West Africa was the pivot of the cocoa trade.西非是可可豆貿(mào)易的中心。The pedal had sheared off at the pivot.踏板在樞軸處斷裂了。Forming the pivot of the exhibition is a large group of watercolours.整個展覽的重點(diǎn)是一大組水彩畫。...
turning on a pivot在樞軸上轉(zhuǎn)動The pedal had sheared off at the pivot.踏板在樞軸處斷裂了。Forming the pivot of the exhibition is a large group of watercolours.整個展覽的重點(diǎn)是一大組水彩畫。Torsional microslip at the clamps results in spurious torques w...