我们需要新鲜的空气来呼吸，我们需要纯净的水来饮用，我们需要一个干净的环境来保持健康。

We need fresh air to breathe. We need pure water to drink. We need a clean environment to be healthy.

youdao

我们需要新鲜的空气来呼吸，我们需要纯净的水来饮用，我们需要一个干净的环境来保持健康。

We need fresh air to breathe. We need pure water to drink. We need a clean environment to be healthy.

youdao