1. Water is in rock deep under the ground, in natural holding areas -- in storage.
    水深藏于地底下的岩层里、在天然蓄水区里 -- 水就储存在那里。

2. The best place for storage of money is a bank.
    银行是存钱最好的地方。

3. Instead, it's important to check levels of a different compound, which indicates the amount of storage of iron in the blood.
    其实，有必要检查血液中另一种混合成分的含量，它显示了血液中铁离子的储量。