短語詞組短語point t of support 支點(diǎn)POS point of Support 支承點(diǎn)rigid point of support 剛性支點(diǎn)Point of support POS 支撐點(diǎn)moment about point of support 對支點(diǎn)的力矩rigid d point of support 剛性支點(diǎn) 返回 point of support