一旦打开,这瓶果汁在冰箱里可以保鲜一周。
Once opened, this juice will ___keep for a week in the fridge.
鲜牛奶不冷藏的话保鲜不了太久。
Fresh milk doesn't ___keep for long without refrigeration.
蜂蜜可以保存多年而不变质。
Honey can ___keep for years without spoiling.