1. Even if a piped water supply is safe at its source, it is not always safe by the time it reaches the tap.
    即使管道供水系统在水源处安全的，等水到达龙头时就不一定总是安全的了。

2. When Canada took similar measures to protect the supply of herring in the 1970s, the fish eventually recovered.
    加拿大在20世纪70年代也曾采过取类似措施来保护鲱鱼的数量，最终鲱鱼的数量得到了恢复。

3. Working in an art-supply shop, "I met working artists and realized you can make a living doing this."
    在一家艺术用品商店工作时，"我遇到了一些工作着的艺术家，并意识到这样做也能谋生。"

4. They are planning to divert the river to supply water somewhere else.
    他们正计划着使这河流转向，以便别处能得到水的供给。

5. There were extraneous minerals in the water supply that made it unsafe to drink.
    自来水中有外来无机物, 使水不宜饮用。

6. The prices are regulated by demand and supply.
    价格随着需要和供应而调整。

7. These trees supply shade in summer.
    夏天这些树提供一片阴凉地方。

8. There is only enough spring water to supply the needs of the house, so we have to pump from the river for farm use.
    泉水只能满足家庭生活用水，因此我们必须从河里抽水以用于农业生产。

9. The once unlimited supply of fresh, clean water is now limited.
    曾经能无限制供应的干净淡水，现在变得有限了。

10. He had exhausted his supply of water.
    他已耗尽了全部供水。