锌的

Just before it was dark, as they passed a great island of Sargasso weed that heaved and swung in the light sea as though the ocean were making love with something under a yellow blanket, his small line was taken by a dolphin.

就在断黑之前，老人和船经过好大一起马尾藻，它在风浪很小的海面上动荡着，仿佛海洋正同什么东西在一条黄色的毯子下做爱，这时候，他那根细钓丝给一条鲯鳅咬住了。

The inventory management cost over the unit time interval is comprised of ordering, holding and shortage costs.

or在单位时间间隔的库存管理成本包含了订货、持货和缺货成本。