牛奶应该放在冰箱里保鲜。

You should keep the milk in the ___icebox to stay fresh.

我们往冷藏箱里放了些冰块来保持食物新鲜。

We put some ice in the ___icebox to keep the food fresh.

冬天的时候，没有暖气的教室简直像个冰箱。

In winter, the classroom without heating feels like an ___icebox.