短语词组短語Buffer -Stock Model 緩沖儲備模型buffer -stock saving 預防性儲蓄buffer r stock 緩沖儲備;保險庫存buffer stock plan 緩沖存貨計劃buffer stock of grain 糧食緩沖儲存Buffer Stock Finacing 緩沖庫存貸款 返回 buffer stock